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Dr Alan Barker

Dr Alan Barker

Associate Professor in Paediatric Physiology and Health

 2766

 Baring Court BC25

 

Baring Court, University of Exeter St Luke's Campus, Heavitree Road, Exeter, EX1 2LU, UK

Overview

I joined Sport and Health Sciences in 2004 to undertake my PhD in Paediatric Exercise Physiology under the supervision of Professor Neil Armstrong and Dr Joanne Welsman.

In 2007 I was appointed as an Associate Research Fellow to continue my research into the muscle metabolic responses of children and adolescents during exercise. This line of work involved using non-invasive techniques such as 31P-magnetic resonance spectroscopy, pulmonary gas exchange kinetics, near infrared spectroscopy and impedance cardiography. Research output is published in internationally recognised journals such as Journal of Applied Physiology, European Journal of Applied Physiology, Medicine and Science in Sports and Exercise, Respiratory Physiology and Neurobiology and NMR in Biomedicine.

In 2010 I was appointed as a Lecturer in Paediatric Exercise and Health, where I am focusing my research interest on pediatric exercise medicine, and the effect of exercise on cardio-metabolic health outcomes in youth.

Broad research specialisms:

  • Limiting factors of oxidative metabolism (e.g. oxygen uptake kinetics, maximal oxygen uptake);
  • Cardiopulmonary exercise testing and exercise training in paediatric patients;
  • The effect of exercise intensity on cardio-metabolic risk factors in children and adolescents;
  • The benefits and risks of exercise training in children and adolescents;
  • Exercise, nutrition and bone health in children and adolescents.

Qualifications

2003 BSc (Hons) Sport, Coaching and Exercise Science (1st Class Award), Manchester Metropolitan University.
2004 MSc Sport and Exercise Physiology (Distinction), Manchester Metropolitan University.
2008 PhD, Paediatric Exercise Physiology, University of Exeter.
2012 Fellow of the Higher Education Academy

Research group links

Research

Research interests

My primary research interest concerns the potential health- and performance-related benefits that can be gained through performing time-efficient, high-intensity exercise (HIE) when compared to a work-matched bout of moderate-intensity exercise (MIE) in children and adolescents. We know that the origin of cardio-metabolic diseases, such as cardiovascular disease and type II diabetes, starts during childhood. Interventions (e.g. exercise) that can promote cardio-metabolic health in children and adolescents may therefore offer primary prevention against these largely preventable diseases.

Research projects

1. The effect of exercise intensity and sex on vascular health outcomes in adolescents

This series of studies investigates the effect an acute bout or repeated bouts (e.g. exercise training) of exercise on vascular health outcomes in adolescents. Health outcomes include the assessment of postprandial lipaemia, hypertension and heart rate variability, and micro- (laser Doppler imaging) and macro- (flow mediated dilation) vascular function following a hyperemic stimulus.

PhD student: Mr Bert Bond (primary supervisor)
Internal collaborators: Professor Craig Williams (secondary supervisor); Dr Sarah Jackman, Professor Neil Armstrong, Dr Philip Gates 
External collaborators: Drs Keith Tolfrey and Laura Barrett (Loughborough University)
Funding: Physiological Society Research Grant and CLES Strategic Development Fund

2. The effect of exercise intensity on insulin sensitivity in youth 

This series of studies investigates the effect of HIE and MIE on glucose tolerance and insulin sensitivity across a range of paediatric groups, including varying pubertal status, body fatness and level of physical activity. We are also collaborating with the local NHS trust to extend this work to children with type I diabetes.

PhD student: Miss Emma Cockcroft (primary supervisor)
Internal collaborators: Professor Craig Williams (SHS); Dr Sarah Jackman (SHS), Professor Neil Armstrong (SHS)
External collaborators: Dr Christopher Moudiotis (Royal Devon and Exeter NHS Trust)

3. Exercise testing and training, and limiting factors of oxidative metabolism, in young people with cystic fibrosis

Maximal oxygen uptake is considered to be a powerful marker of disease prognosis and mortality in patients with cystic fibrosis. This work has therefore developed a test protocol that will allow both a reliable and valid measurement of maximal oxygen uptake in children and adolescents with cystic fibrosis. This work will also use non-invasive measures of oxygen uptake, cardiac output and muscle oxygenation to determine the limiting factors of muscle oxidative metabolism during ramp and square-wave exercise in children and adolescents with cystic fibrosis.

PhD student: Miss Zoe Saynor (secondary supervisor)
Internal collaborators: Professor Craig Williams (primary supervisor);
External collaborators: Dr Patrick Oades (Royal Devon and Exeter NHS Trust)

Funding:

  • The reliability and validity of maximal cardiopulmonary exercise testing as a prognostic tool within the young cystic fibrosis population.
    Royal Devon and Exeter NHS Foundation Trust.
  • The influence of disease status and ‘priming’ exercise on pulmonary oxygen uptake and muscle deoxygenation kinetics during moderate and high intensity exercise in paediatric patients with Cystic Fibrosis.
    Royal Devon and Exeter NHS Foundation Trust.
  • An Integrated Approach to Exercise Prescription ad Management in Young Cystic Fibrosis Patients – A Feasibility Study.
    Royal Devon and Exeter NHS Foundation Trust.

Publications

Key publications | Publications by category | Publications by year

Key publications


Bond B, Hind S, Williams CA, Barker AR (In Press). The acute effect of exercise intensity on vascular function in adolescents. Medicine and Science in Sports and Exercise Abstract.
McNarry MA, Farr C, Middlebrooke A, Welford D, Breese B, Armstrong N, Barker AR (2015). Aerobic Function and Muscle Deoxygenation Dynamics during Ramp Exercise in Children. Med Sci Sports Exerc, 47(9), 1877-1884. Abstract.  Author URL.
Bond B, Gates PE, Jackman SR, Corless LM, Williams CA, Barker AR (2015). Exercise intensity and the protection from postprandial vascular dysfunction in adolescents. Am J Physiol Heart Circ Physiol, 308(11), H1443-H1450. Abstract.  Author URL.
Saynor ZL, Barker AR, Oades PJ, Williams CA (2014). Impaired aerobic function in patients with cystic fibrosis during ramp exercise. Med Sci Sports Exerc, 46(12), 2271-2278. Abstract.  Author URL.
Barker AR, Welsman JR, Welford D, Fulford J, Armstrong N (2010). Quadriceps muscle energetics during an incremental test to exhaustion in children and adults. Medicine and Science in Sports and Exercise
Barker AR, Welsman JR, Fulford J, Welford D, Armstrong N (2008). Muscle phosphocreatine kinetics in children and adults at the onset and offset of moderate-intensity exercise. J Appl Physiol (1985), 105(2), 446-456. Abstract.  Author URL.

Publications by category


Journal articles

Cockcroft EJ, williams C, jackman S, armstrong N, barker A (In Press). Agreement and Reliability of Fasted and Oral Glucose Tolerance Test-Derived Indices of Insulin Sensitivity and Beta Cell Function in Boys. International journal of sports medicince
Suemi da Costa Rosa C, Gracia Marco L, Barker AR, Freitas Junior IF, Monteiro HL (In Press). Assessment of physical activity by accelerometer and IPAQ-short version in patients with chronic kidney disease undergoing hemodialysis. Blood Purification
Agbaje A, Barker A, Tuomainen T-P (In Press). Cardiorespiratory fitness, fat mass and cardiometabolic health with endothelial function, arterial elasticity, and stiffness. Medicine and Science in Sports and Exercise
Williams CAP, Vlachopoulos D, Ubago-Guisade E, Barker AR, Metcalf B, Fatouros IG, Avoniti A, Knapp K, Gracia-Marco L (In Press). Determinants of bone outcomes in adolescent athletes at baseline: the PRO-BONE study. Medicine and Science in Sports and Exercise
Weston M, Barker A, Tomlinson O, Coombes JS, Bailey TG, Bond B (In Press). Differences in cerebrovascular regulation and ventilatory responses during ramp incremental cycling in children, adolescents and adults. Journal of Applied Physiology
Williams C, Oliveira R, Barker A, Kranen S, Debras F (In Press). Effects of high-intensity interval training on the vascular and autonomic components of the baroreflex at rest in adolescents. Pediatric Exercise Science
Denford S, Mackintosh KA, McNarry MA, Barker AR, Williams CA (In Press). Enhancing intrinsic motivation for physical activity among adolescents with cystic fibrosis: a qualitative study of the views of healthcare professionals. BMJ Open
Fulford J, Juroskova V, Meakin JR, Barker AR (In Press). Muscle function and size in the lumbar spine before and after a four week exercise intervention. Journal of Back and Musculoskeletal Rehabilitation
Tomlinson O, Barker A, Fulford J, Wilson P, Oades P, Williams C (In Press). Quantification of thigh muscle volume in children and adolescents using magnetic resonance imaging. European Journal of Sport Science, 20, 1215-1224.
Williams C, Breese B, Saynor Z, Barker A, Armstrong N (In Press). RELATIONSHIP BETWEEN (NON)LINEAR PHASE II PULMONARY OXYGEN UPTAKE KINETICS WITH SKELETAL MUSCLE OXYGENATION AND AGE IN 11 TO 15 Y OLDS. Experimental Physiology
Wilkinson K, Vlachopoulos D, Klentrou P, Ubago-Guisado E, de Moraes AC, Barker AR, Williams CA, Moreno LA, Gracia Marco L (In Press). Soft tissues, areal bone mineral density and hip geometry estimates in active young boys: the PRO-BONE study. European Journal of Applied Physiology
Bond B, Koep J, Weston M, Barker A, Sansum K (In Press). The acute and postprandial effects of sugar moiety on vascular and metabolic health outcomes in adolescents. Applied Physiology, Nutrition and Metabolism
Bond B, Hind S, Williams CA, Barker AR (In Press). The acute effect of exercise intensity on vascular function in adolescents. Medicine and Science in Sports and Exercise Abstract.
Constable A, Vlachopoulos D, Barker A, Moore S, Soininen S, Haapala E, Väist J, Westgate K, Brage S, Mahonen A, et al (In Press). The independent and interactive associations of physical activity intensity and vitamin D status with bone mineral density in prepubertal children: the PANIC Study. Osteoporosis International
Williams C, Barker A, Wadey C, Weston M, Dorobantu D (In Press). The role of cardiopulmonary exercise testing (CPET) in predicting mortality and morbidity in people with congenital heart disease: a systematic review and meta-analysis. European Journal of Preventive Cardiology
Bond B, Barker A, Koep J, Weston M, Lester A, Coombes J, Bailey T (In Press). The within and between-day reliability of cerebrovascular reactivity using traditional and novel analytical approaches. Experimental Physiology Abstract.
Mann R, McKay C, Clift B, Anthony C, Barker A (In Press). Training Practices and Injuries in Competitive Adolescent Distance Runners: a Retrospective Cross-Sectional Study.  Abstract.
Mann RH, McKay CD, Clift BC, Williams CA, Barker AR (In Press). Training Practices and Injuries in Competitive Adolescent Distance Runners: a Retrospective Cross-Sectional Study.  Abstract.
Denford S, Hill DM, Mackintosh KA, McNarry MA, Barker AR, Williams CA (In Press). Using photo-elicitation to explore perceptions of physical activity among young people with cystic fibrosis. BMC Pulmonary Medicine
Agbaje AO, Barker AR, Tuomainen T-P (2021). 1244Associations of endothelial function, arterial elasticity, and arterial stiffness with adiponectin and skeletal muscle mass. International Journal of Epidemiology, 50(Supplement_1).
Agbaje AO, Barker AR, Tuomainen T-P (2021). Abstract 080: a 15-year Cumulative High Exposure to Lean Mass and Blood Pressure but not Fat Mass predicts the 7-year change in Carotid-Femoral Pulse Wave Velocity and Carotid Intima-Media Thickness: the ALSPAC study. Circulation, 143(Suppl_1).
Agbaje AO, Barker AR, Tuomainen T-P (2021). Arterial stiffness and carotid intima-media thickness in relation to cardiometabolic health in adolescence: the ALSPAC study. Atherosclerosis, 331
Agbaje AO, Barker AR, Tuomainen TP (2021). Arterial stiffness in adolescence predicts elevated blood pressure in young adulthood: the ALSPAC study. European Heart Journal, 42(Supplement_1).
Agbaje AO, Barker AR, Tuomainen T-P (2021). Association of Fat Mass, Lean Mass, Body Mass Index, and Blood Pressure with Carotid-Femoral Pulse Wave Velocity and Carotid Intima-Media Thickness in Young Adults: the ALSPAC study. Metabolism, 116
Agbaje AO, Barker AR, Tuomainen T-P (2021). Association of carotid-femoral pulse wave velocity and carotid intima-media thickness with cardiometabolic risks among young adults: the Alspac study. Atherosclerosis, 331, e20-e21.
Agbaje AO, Barker AR, Tuomainen T-P (2021). Associations of Endothelial Function, Arterial Elasticity, and Arterial Stiffness with Cardiorespiratory Fitness and Fat Mass. Medicine & Science in Sports & Exercise, 53(8S), 191-192.
Agbaje AO, Barker AR, Tuomainen T-P (2021). Effects of Arterial Stiffness and Carotid Intima-Media Thickness Progression on the Risk of Overweight/Obesity and Elevated Blood Pressure/Hypertension: a Cross-Lagged Cohort Study. Hypertension Abstract.
Mann RH, McKay CD, Clift BC, Williams CA, Barker AR (2021). Injuries and Training Practices in Competitive Adolescent Distance Runners: a Retrospective Cross-Sectional Study. Frontiers in Sports and Active Living, 3 Abstract.
Agbaje AO, Barker AR, Tuomainen T-P (2021). LONGITUDINAL ASSOCIATIONS OF FAT MASS, LEAN MASS, BODY MASS INDEX AND BLOOD PRESSURE FROM CHILDHOOD THROUGH YOUNG ADULTHOOD WITH CAROTID-FEMORAL PULSE WAVE VELOCITY AND CAROTID INTIMA-MEDIA THICKNESS AT AGE 24.5 YEARS. Journal of the American College of Cardiology, 77(18).
Mann RH, Clarsen BM, McKay CD, Clift BC, Williams CA, Barker AR (2021). Prevalence and burden of health problems in competitive adolescent distance runners: a 6-month prospective cohort study. Journal of Sports Sciences, 39(12), 1366-1375.
Haapala EA, Barker AR, Lakka TA (2021). Response. Medicine and Science in Sports and Exercise, 53(2).
Barker A, Bond B, Duncombe S, Earle R, Stylianou M, Varley-Campbell J, Vlachopoulos D, Walker J, Weston K (2021). School-based high-intensity interval training programs in children and adolescents: a Systematic Review and Meta-Analysis. Journal of Science and Medicine in Sport, 24, s78-s79.
Constable AM, Porter JE, Benger D, Vlachopoulos D, Barker AR, Moore SA, Soininen S, Haapala EA, Westgate K, Brage S, et al (2021). The Positive Relationship between Moderate-to-Vigorous Physical Activity and Bone Mineral Content is Not Mediated by Free Leptin Index in Prepubertal Children: the PANIC Study. International Journal of Environmental Research and Public Health, 18(10), 5365-5365. Abstract.
Kranen SH, Oliveira RS, Bond B, Williams CA, Barker AR (2021). The acute effect of high‐ and moderate‐intensity interval exercise on vascular function before and after a glucose challenge in adolescents. Experimental Physiology, 106(4), 913-924.
Tomlinson OW, Denford S, Barker AR, Schneiderman JE, Campisi ES, Douglas H, Rand S, McNarry MA, Mackintosh KA, Williams CA, et al (2021). The impact of physical activity and exercise interventions for physical health in people with cystic fibrosis: protocol for a systematic review. Systematic Reviews, 10(1). Abstract.
Mann R, Barker A, Williams C, Clift B (2020). 307 the prevalence and burden of health problems in competitive adolescent distance runners: a prospective study in England. British Journal of Sports Medicine, 54(Suppl 1).
Bianchim MS, McNarry MA, Larun L, Barker AR, Williams CA, Mackintosh KA (2020). Calibration and validation of accelerometry using cut-points to assess physical activity in paediatric clinical groups: a systematic review. Preventive Medicine Reports, 19, 101142-101142.
Malik AA, Williams CA, Weston KL, Barker AR (2020). Influence of personality and self-efficacy on perceptual responses during high-intensity interval exercise in adolescents. Journal of Applied Sport Psychology, 33(6), 590-608.
Agbaje AO, Barker AR, Tuomainen T-P (2020). Mediating role of cardiorespiratory fitness on the association of cardiometabolic health with endothelial function, arterial elasticity and arterial stiffness in 9-11-year olds: the ALSPAC study. Atherosclerosis, 315, e181-e182.
Tomlinson OW, Barker AR, Trott J, Oades PJ, Withers NJ, Williams CA (2020). P298 Annual changes in aerobic fitness are biased between normative equations in children and adolescents with cystic fibrosis. Journal of Cystic Fibrosis, 19, S139-S139.
Williams C, Denford S, Tomlinson O, Barker A, McNarry M, Mackintosh K, Cox N, Holland A, O'Halloran P (2020). Physical activity for cystic fibrosis: perceptions of people with cystic fibrosis, parents and healthcare professionals. ERJ Open Research, 6
Tallon CM, Barker AR, Nowak-Flück D, Ainslie PN, McManus AM (2020). The influence of age and sex on cerebrovascular reactivity and ventilatory response to hypercapnia in children and adults. Exp Physiol, 105(7), 1090-1101. Abstract.  Author URL.
Koep JL, Barker AR, Banks R, Banger RR, Sansum KM, Weston ME, Bond B (2020). The reliability of a breath‐hold protocol to determine cerebrovascular reactivity in adolescents. Journal of Clinical Ultrasound, 48(9), 544-552.
Wadey CA, Weston ME, Dorobantu DM, Taylor RS, Pieles GE, Barker AR, Williams CA (2020). The role of cardiopulmonary exercise testing (CPET) in predicting mortality and morbidity in people with congenital heart disease: a systematic review and meta-analysis (Protocol). Journal of Congenital Cardiology, 4(1). Abstract.
Williams CA, Tomlinson OW, Withers NJ, Oades PJ, Barker AR (2020). WS16.4 Differences in the ventilatory response to incremental exercise in people with cystic fibrosis according to age and sex. Journal of Cystic Fibrosis, 19, S27-S28.
Cox NS, Eldridge B, Rawlings S, Dreger J, Corda J, Hauser J, Button BM, Bishop J, Nichols A, Middleton A, et al (2019). A web-based intervention to promote physical activity in adolescents and young adults with cystic fibrosis: protocol for a randomized controlled trial. BMC Pulm Med, 19(1). Abstract.  Author URL.
Du Rietz E, Barker AR, Michelini G, Rommel A-S, Vainieri I, Asherson P, Kuntsi J (2019). Beneficial effects of acute high-intensity exercise on electrophysiological indices of attention processes in young adult men. Behav Brain Res, 359, 474-484. Abstract.  Author URL.
Tomlinson O, Barker A, Williams C (2019). Cardiopulmonary exercise testing in young people with cystic fibrosis. The Sport and Exercise Scientist, 61, 22-22.
HAAPALA EA, WIKLUND P, LINTU N, TOMPURI T, VÄISTÖ J, FINNI T, TARKKA IM, KEMPPAINEN T, BARKER AR, EKELUND ULF, et al (2019). Cardiorespiratory Fitness, Physical Activity, and Insulin Resistance in Children. Medicine & Science in Sports & Exercise, 52(5), 1144-1152.
Farr C, Middlebrooke AR, Armstrong N, Barker AR, Fulford J, Mawson DM, McManus AM (2019). Caution with Conclusions Required: a Response to the Paper "Objectively Measured Aerobic Fitness is not related to Vascular Health Outcomes and Cardiovascular Disease Risk in 9-10 Year Old Children" response. JOURNAL OF SPORTS SCIENCE AND MEDICINE, 18(4), 831-833. Author URL.
Ubago-Guisado E, Vlachopoulos D, Barker AR, Christoffersen T, Metcalf B, Gracia-Marco L (2019). Effect of maturational timing on bone health in male adolescent athletes engaged in different sports: the PRO-BONE study. J Sci Med Sport, 22(3), 253-258. Abstract.  Author URL.
Oliveira RS, Barker AR, Debras F, Kranen SH, Williams CA (2019). Effects of exercise intensity on vascular and autonomic components of the baroreflex following glucose ingestion in adolescents. Eur J Appl Physiol, 119(4), 867-878. Abstract.  Author URL.
Dirks ML, Wall BT, Otten B, Cruz AM, Dunlop MV, Barker AR, Stephens FB (2019). High-fat Overfeeding Does Not Exacerbate Rapid Changes in Forearm Glucose and Fatty Acid Balance During Immobilization. The Journal of Clinical Endocrinology & Metabolism, 105(1), 276-289. Abstract.
Farr C, Middlebrooke AR, Armstrong N, Barker AR, Fulford J, Mawson DM, McManus AM (2019). Objectively Measured Aerobic Fitness is Not Related to Vascular Health Outcomes and Cardiovascular Disease Risk in 9-10 Year Old Children. JOURNAL OF SPORTS SCIENCE AND MEDICINE, 18(3), 513-522. Author URL.
Denford S, Mackintosh K, McNarry M, Barker A, Williams C, Group AYU (2019). P377 Attitudes and experiences of physical activity among an international sample of people with cystic fibrosis and their support teams. Journal of Cystic Fibrosis, 18
Williams C, Tomlinson O, Withers N, Oades P, Barker A (2019). P383 Sex and age differences in aerobic fitness in people with cystic fibrosis. Journal of Cystic Fibrosis, 18, S166-S166.
Agbaje AO, Haapala EA, Lintu N, Viitasalo A, Barker AR, Takken T, Tompuri T, Lindi V, Lakka TA (2019). Peak oxygen uptake cut-points to identify children at increased cardiometabolic risk - the PANIC Study. Scand J Med Sci Sports, 29(1), 16-24. Abstract.  Author URL.
Williams CAP, Malik A, Barker A, Weston K (2019). Perceptual and Cardiorespiratory Responses to High-Intensity Interval Exercise in Adolescents: Does Work Intensity Matter?. Journal of Sports Science and Medicine
Williams CA, Barker AR, Tomlinson OW (2019). Prediction of peak oxygen uptake using the modified shuttle test - Methodological concerns and implications for clinical practice. Pediatr Pulmonol, 54(8), 1104-1105. Author URL.
Denford S, Mackintosh KA, McNarry MA, Barker AR, Williams CA (2019). Promotion of physical activity for adolescents with cystic fibrosis: a qualitative study of UK multi-disciplinary cystic fibrosis teams. Physiotherapy
Kranen SH, Bond B, Williams CA, Barker AR (2019). Reliability of low-flow vasoreactivity in the brachial artery of adolescents. Journal of Clinical Ultrasound, 47(3), 133-138. Abstract.
Koep J, Barker A, Bond B, Coombes J, Bailey T (2019). Shear stress and cerebrovascular function during acute isometric exercise: the role of exercise intensity and aging. Journal of Science and Medicine in Sport, 22
Mann RH, Williams CA, Clift BC, Barker AR (2019). The Validation of Session Rating of Perceived Exertion for Quantifying Internal Training Load in Adolescent Distance Runners. Int J Sports Physiol Perform, 14(3), 354-359. Abstract.  Author URL.
Cockcroft EJ, Bond B, Williams CA, Harris S, Jackman SR, Armstrong N, Barker AR (2019). The effects of two weeks high-intensity interval training on fasting glucose, glucose tolerance and insulin resistance in adolescent boys: a pilot study. BMC Sports Science, Medicine and Rehabilitation, 11(1). Abstract.
Sansum KM, Weston ME, Bond B, Cockcroft EJ, O'Connor A, Tomlinson OW, Williams CA, Barker AR (2019). Validity of the Supramaximal Test to Verify Maximal Oxygen Uptake in Children and Adolescents. Pediatr Exerc Sci, 31(2), 213-222. Abstract.  Author URL.
Tomlinson OW, Barker AR, Trott J, Withers NJ, Oades PJ, Williams CA (2019). WS02-3-1 Validity of prediction equations for evaluating aerobic fitness in cystic fibrosis. Journal of Cystic Fibrosis, 18, S3-S3.
Vlachopoulos D, Barker AR, Ubago-Guisado E, Williams CA, Gracia-Marco L (2018). A 9-Month Jumping Intervention to Improve Bone Geometry in Adolescent Male Athletes. Med Sci Sports Exerc, 50(12), 2544-2554. Abstract.  Author URL.
Vlachopoulos D, Barker AR, Ubago-Guisado E, Williams CA, Gracia-Marco L (2018). A 9-month Jumping Intervention to Improve Bone Acquisition in Adolescent Male Athletes. Medicine & Science in Sports & Exercise, 50(5S).
Cockcroft EJ, Williams CA, Jackman SR, Bassi S, Armstrong N, Barker AR (2018). A single bout of high-intensity interval exercise and work-matched moderate-intensity exercise has minimal effect on glucose tolerance and insulin sensitivity in 7- to 10-year-old boys. Journal of Sports Sciences, 36(2), 149-155. Abstract.
Ferri-Morales A, Nascimento-Ferreira MV, Vlachopoulos D, Ubago-Guisado E, Torres-Costoso A, De Moraes ACF, Barker AR, Moreno LA, Martínez-Vizcaino V, Gracia-Marco L, et al (2018). Agreement Between Standard Body Composition Methods to Estimate Percentage of Body Fat in Young Male Athletes. Pediatr Exerc Sci, 30(3), 402-410. Abstract.  Author URL.
Tomlinson OW, Barker AR, Chubbock LV, Stevens D, Saynor ZL, Oades PJ, Williams CA (2018). Analysis of oxygen uptake efficiency parameters in young people with cystic fibrosis. European Journal of Applied Physiology, 118(10), 2055-2063.
Oliveira RS, Barker AR, Williams CA (2018). Cardiac Autonomic Function, Cardiovascular Risk and Physical Activity in Adolescents. Int J Sports Med, 39(2), 89-96. Abstract.  Author URL.
Oliveira R, Barker AR, Debras F, O'Doherty A, Williams CA (2018). Mechanisms of blood pressure control following acute exercise in adolescents: Effects of exercise intensity on haemodynamics and baroreflex sensitivity. Exp Physiol, 103(8), 1056-1066. Abstract.  Author URL.
Malik AA, Williams CA, Weston KL, Barker AR (2018). Perceptual Responses to High- and Moderate-Intensity Interval Exercise in Adolescents. Med Sci Sports Exerc, 50(5), 1021-1030. Abstract.  Author URL.
Malik AA, Williams CA, Weston KL, Barker AR (2018). Perceptual and prefrontal cortex haemodynamic responses to high-intensity interval exercise with decreasing and increasing work-intensity in adolescents. Int J Psychophysiol, 133, 140-148. Abstract.  Author URL.
Barker AR, Gracia-Marco L, Ruiz JR, Castillo MJ, Aparicio-Ugarriza R, González-Gross M, Kafatos A, Androutsos O, Polito A, Molnar D, et al (2018). Physical activity, sedentary time, TV viewing, physical fitness and cardiovascular disease risk in adolescents: the HELENA study. Int J Cardiol, 254, 303-309. Abstract.  Author URL.
Tomlinson OW, Shelley J, Denford S, Barker AR, Oades PJ, Williams CA (2018). Promotion of exercise in the management of cystic fibrosis - summary of national meetings. European Journal for Person Centered Healthcare, 6(2), 196-196. Abstract.
Oliveira RS, Barker AR, Debras F, O'Doherty A, Williams CA (2018). Reliability of autonomic and vascular components of baroreflex sensitivity in adolescents. Clinical Physiology and Functional Imaging, 38(6), 986-993. Abstract.
Vlachopoulos D, Barker AR, Ubago-Guisado E, Ortega FB, Krustrup P, Metcalf B, Castro Pinero J, Ruiz JR, Knapp KM, Williams CA, et al (2018). The effect of 12-month participation in osteogenic and non-osteogenic sports on bone development in adolescent male athletes. The PRO-BONE study. J Sci Med Sport, 21(4), 404-409. Abstract.  Author URL.
Vlachopoulos D, Barker AR, Ubago-Guisado E, Williams CA, Gracia-Marco L (2018). The effect of a high-impact jumping intervention on bone mass, bone stiffness and fitness parameters in adolescent athletes. Arch Osteoporos, 13(1). Abstract.  Author URL.
Williams CA, Tomlinson OW, Chubbock LV, Stevens D, Saynor ZL, Oades PJ, Barker AR (2018). The oxygen uptake efficiency slope is not a valid surrogate of aerobic fitness in cystic fibrosis. Pediatr Pulmonol, 53(1), 36-42. Abstract.  Author URL.
Tomlinson OW, Barker AR, Chubbock LV, Stevens D, Saynor ZL, Oades PJ, Williams CA (2018). WS08.1 the utility of oxygen uptake efficiency as a marker of aerobic fitness in children with cystic fibrosis. Journal of Cystic Fibrosis, 17, S14-S14.
Cockcroft EJ, Williams CA, Weaver H, O'Connor A, Jackman SR, Armstrong N, Barker AR (2017). Acute Exercise and Insulin Sensitivity in Boys: a Time-Course Study. Int J Sports Med, 38(13), 967-974. Abstract.  Author URL.
Malik AA, Williams CA, Bond B, Weston KL, Barker AR (2017). Acute cardiorespiratory, perceptual and enjoyment responses to high-intensity interval exercise in adolescents. European Journal of Sport Science, 17(10), 1335-1342.
Dormehl SJ, Robertson SJ, Barker AR, Williams CA (2017). Confirming the Value of Swimming-Performance Models for Adolescents. Int J Sports Physiol Perform, 12(9), 1177-1185. Abstract.  Author URL.
Cockcroft EJ, Moudiotis C, Kitchen J, Bond B, Williams CA, Barker AR (2017). High-intensity interval exercise and glycemic control in adolescents with type one diabetes mellitus: a case study. Physiol Rep, 5(13). Abstract.  Author URL.
Oliveira RS, Barker AR, Wilkinson KM, Abbott RA, Williams CA (2017). Is cardiac autonomic function associated with cardiorespiratory fitness and physical activity in children and adolescents? a systematic review of cross-sectional studies. Int J Cardiol, 236, 113-122. Abstract.  Author URL.
Vlachopoulos D, Barker AR, Ubago-Guisado E, Fatouros IG, Knapp KM, Williams CA, Gracia-Marco L (2017). Longitudinal Adaptations of Bone Mass, Geometry, and Metabolism in Adolescent Male Athletes: the PRO-BONE Study. J Bone Miner Res, 32(11), 2269-2277. Abstract.  Author URL.
Williams CA, Saynor ZL, Barker AR, Oades PJ, Tomlinson OW (2017). Measurement of V̇o2max in clinical groups is feasible and necessary. J Appl Physiol (1985), 123(4). Author URL.
Bond B, Weston KL, Williams CA, Barker AR (2017). Perspectives on high-intensity interval exercise for health promotion in children and adolescents. Open Access J Sports Med, 8, 243-265. Abstract.  Author URL.
Tomlinson OW, Barker AR, Oades PJ, Williams CA (2017). Scaling the Oxygen Uptake Efficiency Slope for Body Size in Cystic Fibrosis. Med Sci Sports Exerc, 49(10), 1980-1986. Abstract.  Author URL.
Vlachopoulos D, Barker, Williams CA, Arngrímsson SA, Knapp KM, Metcalf B, Fatouros IG, Moreno LA, Gracia Marco (2017). The impact of sport participation on bone mass and geometry in adolescent males. Medicine and Science in Sports and Exercise
Bond B, Williams CA, Barker AR (2017). The reliability of a single protocol to determine endothelial, microvascular and autonomic functions in adolescents. Clin Physiol Funct Imaging, 37(6), 703-709. Abstract.  Author URL.
Fessi MS, Zarrouk N, Di Salvo V, Filetti C, Barker AR, Moalla W (2016). Effects of tapering on physical match activities in professional soccer players. J Sports Sci, 34(24), 2189-2194. Abstract.  Author URL.
Tomlinson OW, Barker AR, Oades PJ, Williams CA (2016). Exercise capacity following a percutaneous endoscopic gastrostomy in a young female with cystic fibrosis: a case report. Physiological Reports, 4(16). Abstract.
Saynor ZL, Barker AR, Oades PJ, Williams CA (2016). Impaired Pulmonary V˙O2 Kinetics in Cystic Fibrosis Depend on Exercise Intensity. Med Sci Sports Exerc, 48(11), 2090-2099. Abstract.  Author URL.
Saynor ZL, Barker AR, Oades PJ, Tomlinson OW, Williams CA (2016). Validity and Reliability Concerns Associated with Cardiopulmonary Exercise Testing Young People with Cystic Fibrosis. Respiration, 92(1), 61-62.
Bond B, Williams CA, Jackman SR, Woodward A, Armstrong N, Barker AR (2015). Accumulating exercise and postprandial health in adolescents. Metabolism: clinical and experimental Abstract.
McNarry MA, Farr C, Middlebrooke A, Welford D, Breese B, Armstrong N, Barker AR (2015). Aerobic Function and Muscle Deoxygenation Dynamics during Ramp Exercise in Children. Med Sci Sports Exerc, 47(9), 1877-1884. Abstract.  Author URL.
Vlachopoulos D, Barker AR, Williams CA, Knapp KM, Metcalf BS, Gracia-Marco L (2015). Effect of a program of short bouts of exercise on bone health in adolescents involved in different sports: the PRO-BONE study protocol. BMC Public Health, 15 Abstract.  Author URL.
Bond B, Williams CA, Isic C, Jackman SR, Tolfrey K, Barrett LA, Barker AR (2015). Exercise intensity and postprandial health outcomes in adolescents. Eur J Appl Physiol, 115(5), 927-936. Abstract.  Author URL.
Bond B, Gates PE, Jackman SR, Corless LM, Williams CA, Barker AR (2015). Exercise intensity and the protection from postprandial vascular dysfunction in adolescents. Am J Physiol Heart Circ Physiol, 308(11), H1443-H1450. Abstract.  Author URL.
Armstrong N, Barker AR, McManus AM (2015). Muscle metabolism changes with age and maturation: How do they relate to youth sport performance?. British Journal of Sports Medicine, 49(13), 860-864. Abstract.
Armstrong N, Barker AR, McManus AM (2015). Muscle metabolism changes with age and maturation: How do they relate to youth sport performance?. Br J Sports Med, 49(13), 860-864. Abstract.  Author URL.
Bond B, Cockcroft EJ, Williams CA, Harris S, Gates PE, Jackman SR, Armstrong N, Barker AR (2015). Two weeks of high-intensity interval training improves novel but not traditional cardiovascular disease risk factors in adolescents. Am J Physiol Heart Circ Physiol, 309(6), H1039-H1047. Abstract.  Author URL.
Williams CA, Saynor ZL, Tomlinson OW, Barker AR (2014). Cystic fibrosis and physiological responses to exercise. Expert Rev Respir Med, 8(6), 751-762. Abstract.  Author URL.
Cockcroft EJ, Williams CA, Tomlinson OW, Vlachopoulos D, Jackman SR, Armstrong N, Barker AR (2014). High intensity interval exercise is an effective alternative to moderate intensity exercise for improving glucose tolerance and insulin sensitivity in adolescent boys. Journal of Science and Medicine in Sport Abstract.
Saynor ZL, Barker AR, Oades PJ, Williams CA (2014). Impaired aerobic function in patients with cystic fibrosis during ramp exercise. Med Sci Sports Exerc, 46(12), 2271-2278. Abstract.  Author URL.
Breese BC, Barker AR, Armstrong N, Fulford J, Williams CA (2014). Influence of thigh activation on the VO₂ slow component in boys and men. Eur J Appl Physiol, 114(11), 2309-2319. Abstract.  Author URL.
Breese BC, Barker AR, Armstrong N, Fulford J, Williams CA (2014). Influence of thigh activation on the [Formula Presented] O<inf>2</inf> slow component in boys and men. European Journal of Applied Physiology, 114(11), 2309-2319. Abstract.
Breese BC, Barker AR, Armstrong N, Fulford J, Williams CA (2014). Influence of thigh muscle activation on pulmonary O2 uptake kinetics during very heavy intensity exercise in boys and men. European Journal of Applied Physiology, 114, 2309-2319. Abstract.
Willcocks RJ, Fulford J, Armstrong N, Barker AR, Williams CA (2014). Muscle metabolism during fatiguing isometric quadriceps exercise in adolescents and adults. Appl Physiol Nutr Metab, 39(4), 439-445. Abstract.  Author URL.
Saynor ZL, Barker AR, Oades PJ, Williams CA (2014). The effect of ivacaftor in adolescents with cystic fibrosis (G551D mutation): an exercise physiology perspective. Pediatr Phys Ther, 26(4), 454-461. Abstract.  Author URL.
Barker AR, Trebilcock E, Breese B, Jones AM, Armstrong N (2014). The effect of priming exercise on O2 uptake kinetics, muscle O2 delivery and utilization, muscle activity, and exercise tolerance in boys. Appl Physiol Nutr Metab, 39(3), 308-317. Abstract.  Author URL.
Barker AR, Day J, Smith A, Bond B, Williams CA (2014). The influence of 2 weeks of low-volume high-intensity interval training on health outcomes in adolescent boys. J Sports Sci, 32(8), 757-765. Abstract.  Author URL.
Fulford J, Liepa A, Barker AR, Meakin JR (2014). The reliability of 31P-MRS and NIRS measurements of spinal muscle function. International Journal of Sports Medicine, 35(13), 1078-1083. Abstract.
Willcocks RJ, Fulford J, Barker AR, Armstrong N, Williams CA (2014). Two protocols to measure mitochondrial capacity in women and adolescent girls: a 31P-MRS preliminary study. Pediatr Exerc Sci, 26(2), 210-217. Abstract.  Author URL.
Saynor ZL, Barker AR, Oades PJ, Williams CA (2013). A protocol to determine valid V˙O2max in young cystic fibrosis patients. J Sci Med Sport, 16(6), 539-544. Abstract.  Author URL.
Saynor ZL, Barker AR, Oades PJ, Williams CA (2013). A protocol to determine valid V̇O2max in young cystic fibrosis patients. Journal of Science and Medicine in Sport, 16(6), 539-544. Abstract.
Nimmerichter A, Holdhaus J, Mehnen L, Vidotto C, Loidl M, Barker AR (2013). Effects of negative air ions on oxygen uptake kinetics, recovery and performance in exercise: a randomized, double-blinded study. International Journal of Biometeorology, 1-10. Abstract.
Saynor ZL, Barker AR, Oades PJ, Williams CA (2013). Reproducibility of maximal cardiopulmonary exercise testing for young cystic fibrosis patients. Journal of Cystic Fibrosis, 12(6), 644-650. Abstract.
Saynor ZL, Barker AR, Oades PJ, Williams CA (2013). Reproducibility of maximal cardiopulmonary exercise testing for young cystic fibrosis patients. J Cyst Fibros, 12(6), 644-650. Abstract.  Author URL.
Saynor ZL, Barker AR, Oades PJ, Williams CA (2012). 168 a protocol to determine O2max in young patients with cystic fibrosis: recommendations for clinical practice. Journal of Cystic Fibrosis, 11
Barker AR, Bond B, Toman C, Williams CA, Armstrong N (2012). Critical power in adolescents: physiological bases and assessment using all-out exercise. Eur J Appl Physiol, 112(4), 1359-1370. Abstract.  Author URL.
Armstrong N, Barker AR (2012). New insights in paediatric exercise metabolism. JOURNAL OF SPORT AND HEALTH SCIENCE, 1(1), 18-26. Author URL.
Breese BC, Barker AR, Armstrong N, Jones AM, Williams CA (2012). The effect of baseline metabolic rate on pulmonary O₂ uptake kinetics during very heavy intensity exercise in boys and men. Respir Physiol Neurobiol, 180(2-3), 223-229. Abstract.  Author URL.
Williams CA, Saynor ZL, Barker AR, Oades PJ (2012). WS16.2 the reliability of maximal cardiopulmonary exercise testing for young cystic fibrosis patients. Journal of Cystic Fibrosis, 11
Barker AR, Bond B, Toman C, Williams CA, Armstrong N (2011). Critical power in adolescents: physiological bases and assessment using all-out exercise. European Journal of Applied Physiology, 1-12.
Armstrong N, Barker AR (2011). Endurance Training and Elite Young Athletes. Medicine and Sport Science, 56, 59-83. Abstract.
Barker AR, Williams CA, Jones AM, Armstrong N (2011). Establishing maximal oxygen uptake in young people during a ramp cycle test to exhaustion. British Journal of Sports Medicine, 45(6), 498-503. Abstract.
Barker AR, Armstrong N (2011). Exercise testing elite young athletes. Med Sport Sci, 56, 106-125. Abstract.  Author URL.
Breese BC, Armstrong N, Barker AR, Williams CA (2011). The effect of pedal rate on pulmonary O2 uptake kinetics during very heavy intensity exercise in trained and untrained teenage boys. Respir Physiol Neurobiol, 177(2), 149-154. Abstract.  Author URL.
Willcocks RJ, Williams CA, Barker AR, Fulford J, Armstrong N (2010). Age- and Sex- Related Differences in Muscle Phosphocreatine and Oxygenation Kinetics during High Intensity Exercise in Adolescents and Adults. Nuclear Magnetic Resonance in Biomedicine
Willcocks RJ, Williams CA, Barker AR, Fulford J, Armstrong N (2010). Age- and sex-related differences in muscle phosphocreatine and oxygenation kinetics during high-intensity exercise in adolescents and adults. NMR Biomed, 23(6), 569-577. Abstract.  Author URL.
Berthoin S, Dupont G, Baquet G (2010). Commentaries on Viewpoint: Do oxidative and anaerobic energy production in exercising muscle change throughout growth and maturation? Manifestations of a common underlying cause. Journal of applied physiology (Bethesda, Md. : 1985), 109(5).
Armstrong N, Barker AR (2010). Endurance training and elite young athletes. , 56, 59-83. Abstract.
Barker AR, Armstrong N (2010). Exercise Testing Elite Young Athletes. Medicine and Sport Science, 56, 106-125.
Barker AR, Armstrong N (2010). Insights into Development Muscle Metabolism through the Use of 31P-Magnetic Resonance Spectroscopy. Pediatric Exercise Science
Barker AR, Armstrong N (2010). Insights into developmental muscle metabolism through the use of 31P-magnetic resonance spectroscopy: a review. Pediatr Exerc Sci, 22(3), 350-368. Abstract.
Barker AR, Armstrong N (2010). Insights into developmental muscle metabolism through the use of <sup>31</sup>P-magnetic resonance spectroscopy: a review. Pediatric Exercise Science, 22(3), 350-368. Abstract.
Breese BC, Williams CA, Barker AR, Weisman JR, Fawkner SG, Armstrong N (2010). Longitudinal Changes in the Oxygen Uptake Kinetic Response to Heavy-Intensity Exercise in 14- to 16-Year-Old Boys (Reprinted from PES, vol 22). PEDIATRIC EXERCISE SCIENCE, 22(2), 314-325. Author URL.
Breese BC, Williams CA, Barker AR, Welsman JR, Fawkner SG, Armstrong N (2010). Longitudinal change in the oxygen uptake kinetic response to heavy-intensity exercise in 14- to 16-years-old boys. Pediatr Exerc Sci, 22(2), 314-325.
Breese BC, Williams CA, Barker AR, Welsman JR, Fawker SG, Armstrong N (2010). Longitudinal changes in the oxygen uptake kinetic response to heavy-intensity exercise in 14- to 16-year-old boys. Pediatric Exercise Science, 22(1), 69-80.
Barker AR, Welsman JR, Welford D, Fulford J, Armstrong N (2010). Quadriceps muscle energetics during an incremental test to exhaustion in children and adults. Medicine and Science in Sports and Exercise
Barker AR, Welsman JR, Fulford J, Welford D, Armstrong N (2010). Quadriceps muscle energetics during incremental exercise in children and adults. Med Sci Sports Exerc, 42(7), 1303-1313. Abstract.  Author URL.
Barker AR, Breese BC, Willcocks RJ, Williams CA, Armstrong N (2010). The importance of exercise intensity when studying developmental energy metabolism. Journal of Applied Physiology, 109(5), 1565-1566.
Barker AR, Jones AM, Armstrong N (2010). The influence of priming exercise on oxygen uptake, cardiac output, and muscle oxygenation kinetics during very heavy-intensity exercise in 9- to 13-yr-old boys. J Appl Physiol (1985), 109(2), 491-500. Abstract.  Author URL.
Williams CA, Willcocks RJ, Barker AR, Fulford J, Armstrong N (2009). Muscle Phosphocreatine Kinetics in Children and Adults During High-intensity Exercise. Medicine & Science in Sports & Exercise, 41(5).
Armstrong N, Barker AR (2009). Oxygen uptake kinetics in children and adolescents: a review. Pediatr Exerc Sci, 21(2), 130-147. Abstract.  Author URL.
Willcocks RJ, Barker AR, Fulford J, Welford D, Welsman JR, Armstrong N, Williams CA (2008). Kinetics of Phosphocreatine and Deoxyhemoglobin in Children and Adults During High-Intensity Exercise. MEDICINE AND SCIENCE IN SPORTS AND EXERCISE, 40(5), S20-S20. Author URL.
Barker AR, Welsman JR, Fulford J, Welford D, Williams CA, Armstrong N (2008). Muscle phosphocreatine and pulmonary oxygen uptake kinetics in children at the onset and offset of moderate intensity exercise. Eur J Appl Physiol, 102(6), 727-738. Abstract.  Author URL.
Barker AR, Welsman JR, Fulford J, Welford D, Armstrong N (2008). Muscle phosphocreatine kinetics in children and adults at the onset and offset of moderate-intensity exercise. J Appl Physiol (1985), 105(2), 446-456. Abstract.  Author URL.
Barker AR, Welsman JR, Fulford J, Welford D, Armstrong N (2008). Quadriceps Muscle Phosphocreatine and Deoxygenation Kinetics in Children and Adults at the Onset of Moderate Intensity Exercise. MEDICINE AND SCIENCE IN SPORTS AND EXERCISE, 40(5), S20-S20. Author URL.
Williams CA, Willcocks RJ, Barker AR, Fulford J, Welford D, Welsman JR, Armstrong N (2008). Recovery of Muscle Oxygenation and Phosphocreatine in Children and Adults Following High-Intensity Quadriceps Exercise. MEDICINE AND SCIENCE IN SPORTS AND EXERCISE, 40(5), S20-S20. Author URL.
Tolfrey K, Barker A, Thom JM, Morse CI, Narici MV, Batterham AM (2006). Quantification of active muscle mass during experimental exercise - Reply. J APPL PHYSIOL, 101(5), 1535-1535.
Barker A, Welsman J, Welford D, Fulford J, Williams C, Armstrong N (2006). Reliability of 31P-magnetic resonance spectroscopy during an exhaustive incremental exercise test in children. Eur J Appl Physiol, 98(6), 556-565. Abstract.  Author URL.
Barker A, Welsman J, Welford D, Fulford J, Williams C, Armstrong N (2006). Reliability of <sup>31</sup>P-magnetic resonance spectroscopy during an exhaustive incremental exercise test in children. European Journal of Applied Physiology, 98(6), 556-565. Abstract.
Tolfrey K, Barker A, Thom JM, Morse CI, Narici MV, Batterham AM (2006). Scaling maximum oxygen uptake using lower leg muscle volume provides further insight into the pitfalls of whole body-mass power laws - Reply. JOURNAL OF APPLIED PHYSIOLOGY, 101(3), 1007-1007. Author URL.
Tolfrey K, Barker A, Thom JM, Morse CI, Narici MV, Batterham AM (2006). Scaling of maximal oxygen uptake by lower leg muscle volume in boys and men. J Appl Physiol (1985), 100(6), 1851-1856. Abstract.  Author URL.

Chapters

Williams CA, Barker AR (2021). The role of physical activity, exercise, and fitness in medicine. In  (Ed) Exercise and Respiratory Diseases in Paediatrics, 1-20.
Barker A, Gracia-Marco L, Vlachopoulos D, Williams C (2018). Growth, Maturation, and Physical Fitness. In Norton K, Eston R (Eds.) Kinanthropometry and Exercise Physiology, London: Routledge.
Vlachopoulos D, Gracia-Marco L, Barker AR, Huybrechts I, Moreno LA, Mouratidou T (2016). Bone health: the independent and combined effects of calcium, Vitamin D and exercise in children and adolescents. In  (Ed) Food and Nutritional Components in Focus, 530-546.  Abstract.
Barker AR, Armstrong N (2012). Aerobic Power, Tests of. In  (Ed) Encyclopedia of Exercise Medicine in Health and Disease, 32-37.

Conferences

Vlachopoulos D, Barker A, Williams C, Gracia-Marco L (2019). How Different Loading Sports and a 9-Month Plyometric Intervention Programme Affect Bone Turnover Markers During Adolescence: the PRO-BONE Study. the 9th Conference of Biochemistry and Physiology of Exercise.  Abstract.
Vlachopoulos D, Barker AR, Williams CA, Gracia-Marco L (2019). How Different Loading Sports and a 9-Month Plyometric Intervention Programme Affect Bone Turnover Markers During Adolescence: the PRO-BONE Study.  Abstract.
Vlachopoulos D, Barker AR, Ubago-Guisado E, Williams CA, Gracia-Marco L (2018). A 9-month Jumping Intervention to Improve Bone Acquisition in Adolescent Male Athletes: the PRO-BONE Study.  Author URL.
Vlachopoulos D, Barker A, Ubago-Guisado E, Williams C, Gracia-Marco L (2018). HOW DIFFERENT LOADING SPORTS AFFECT BONE DEVELOPMENT DURING ADOLESCENCE AND HOW TO IMPROVE IT? THE PRO-BONE STUDY FINDINGS.  Author URL.

Publications by year


In Press

Cockcroft EJ, williams C, jackman S, armstrong N, barker A (In Press). Agreement and Reliability of Fasted and Oral Glucose Tolerance Test-Derived Indices of Insulin Sensitivity and Beta Cell Function in Boys. International journal of sports medicince
Suemi da Costa Rosa C, Gracia Marco L, Barker AR, Freitas Junior IF, Monteiro HL (In Press). Assessment of physical activity by accelerometer and IPAQ-short version in patients with chronic kidney disease undergoing hemodialysis. Blood Purification
Agbaje A, Barker A, Tuomainen T-P (In Press). Cardiorespiratory fitness, fat mass and cardiometabolic health with endothelial function, arterial elasticity, and stiffness. Medicine and Science in Sports and Exercise
Williams CAP, Vlachopoulos D, Ubago-Guisade E, Barker AR, Metcalf B, Fatouros IG, Avoniti A, Knapp K, Gracia-Marco L (In Press). Determinants of bone outcomes in adolescent athletes at baseline: the PRO-BONE study. Medicine and Science in Sports and Exercise
Weston M, Barker A, Tomlinson O, Coombes JS, Bailey TG, Bond B (In Press). Differences in cerebrovascular regulation and ventilatory responses during ramp incremental cycling in children, adolescents and adults. Journal of Applied Physiology
Williams C, Oliveira R, Barker A, Kranen S, Debras F (In Press). Effects of high-intensity interval training on the vascular and autonomic components of the baroreflex at rest in adolescents. Pediatric Exercise Science
Denford S, Mackintosh KA, McNarry MA, Barker AR, Williams CA (In Press). Enhancing intrinsic motivation for physical activity among adolescents with cystic fibrosis: a qualitative study of the views of healthcare professionals. BMJ Open
Fulford J, Juroskova V, Meakin JR, Barker AR (In Press). Muscle function and size in the lumbar spine before and after a four week exercise intervention. Journal of Back and Musculoskeletal Rehabilitation
Tomlinson O, Barker A, Fulford J, Wilson P, Oades P, Williams C (In Press). Quantification of thigh muscle volume in children and adolescents using magnetic resonance imaging. European Journal of Sport Science, 20, 1215-1224.
Williams C, Breese B, Saynor Z, Barker A, Armstrong N (In Press). RELATIONSHIP BETWEEN (NON)LINEAR PHASE II PULMONARY OXYGEN UPTAKE KINETICS WITH SKELETAL MUSCLE OXYGENATION AND AGE IN 11 TO 15 Y OLDS. Experimental Physiology
Wilkinson K, Vlachopoulos D, Klentrou P, Ubago-Guisado E, de Moraes AC, Barker AR, Williams CA, Moreno LA, Gracia Marco L (In Press). Soft tissues, areal bone mineral density and hip geometry estimates in active young boys: the PRO-BONE study. European Journal of Applied Physiology
Bond B, Koep J, Weston M, Barker A, Sansum K (In Press). The acute and postprandial effects of sugar moiety on vascular and metabolic health outcomes in adolescents. Applied Physiology, Nutrition and Metabolism
Bond B, Hind S, Williams CA, Barker AR (In Press). The acute effect of exercise intensity on vascular function in adolescents. Medicine and Science in Sports and Exercise Abstract.
Constable A, Vlachopoulos D, Barker A, Moore S, Soininen S, Haapala E, Väist J, Westgate K, Brage S, Mahonen A, et al (In Press). The independent and interactive associations of physical activity intensity and vitamin D status with bone mineral density in prepubertal children: the PANIC Study. Osteoporosis International
Williams C, Barker A, Wadey C, Weston M, Dorobantu D (In Press). The role of cardiopulmonary exercise testing (CPET) in predicting mortality and morbidity in people with congenital heart disease: a systematic review and meta-analysis. European Journal of Preventive Cardiology
Bond B, Barker A, Koep J, Weston M, Lester A, Coombes J, Bailey T (In Press). The within and between-day reliability of cerebrovascular reactivity using traditional and novel analytical approaches. Experimental Physiology Abstract.
Mann R, McKay C, Clift B, Anthony C, Barker A (In Press). Training Practices and Injuries in Competitive Adolescent Distance Runners: a Retrospective Cross-Sectional Study.  Abstract.
Mann RH, McKay CD, Clift BC, Williams CA, Barker AR (In Press). Training Practices and Injuries in Competitive Adolescent Distance Runners: a Retrospective Cross-Sectional Study.  Abstract.
Denford S, Hill DM, Mackintosh KA, McNarry MA, Barker AR, Williams CA (In Press). Using photo-elicitation to explore perceptions of physical activity among young people with cystic fibrosis. BMC Pulmonary Medicine

2021

Agbaje AO, Barker AR, Tuomainen T-P (2021). 1244Associations of endothelial function, arterial elasticity, and arterial stiffness with adiponectin and skeletal muscle mass. International Journal of Epidemiology, 50(Supplement_1).
Agbaje AO, Barker AR, Tuomainen T-P (2021). Abstract 080: a 15-year Cumulative High Exposure to Lean Mass and Blood Pressure but not Fat Mass predicts the 7-year change in Carotid-Femoral Pulse Wave Velocity and Carotid Intima-Media Thickness: the ALSPAC study. Circulation, 143(Suppl_1).
Smail O (2021). Acute and Long-Term Effects of Resistance Exercise on Dynamic Cerebral Autoregulation.  Abstract.
Agbaje AO, Barker AR, Tuomainen T-P (2021). Arterial stiffness and carotid intima-media thickness in relation to cardiometabolic health in adolescence: the ALSPAC study. Atherosclerosis, 331
Agbaje AO, Barker AR, Tuomainen TP (2021). Arterial stiffness in adolescence predicts elevated blood pressure in young adulthood: the ALSPAC study. European Heart Journal, 42(Supplement_1).
Agbaje AO, Barker AR, Tuomainen T-P (2021). Association of Fat Mass, Lean Mass, Body Mass Index, and Blood Pressure with Carotid-Femoral Pulse Wave Velocity and Carotid Intima-Media Thickness in Young Adults: the ALSPAC study. Metabolism, 116
Agbaje AO, Barker AR, Tuomainen T-P (2021). Association of carotid-femoral pulse wave velocity and carotid intima-media thickness with cardiometabolic risks among young adults: the Alspac study. Atherosclerosis, 331, e20-e21.
Agbaje AO, Barker AR, Tuomainen T-P (2021). Associations of Endothelial Function, Arterial Elasticity, and Arterial Stiffness with Cardiorespiratory Fitness and Fat Mass. Medicine & Science in Sports & Exercise, 53(8S), 191-192.
Agbaje AO, Barker AR, Tuomainen T-P (2021). Effects of Arterial Stiffness and Carotid Intima-Media Thickness Progression on the Risk of Overweight/Obesity and Elevated Blood Pressure/Hypertension: a Cross-Lagged Cohort Study. Hypertension Abstract.
Mann R (2021). Health and Wellbeing in Competitive Adolescent Distance Runners: Training Load, Health Problems, and Psychosocial Response to Injury.  Abstract.
Mann RH, McKay CD, Clift BC, Williams CA, Barker AR (2021). Injuries and Training Practices in Competitive Adolescent Distance Runners: a Retrospective Cross-Sectional Study. Frontiers in Sports and Active Living, 3 Abstract.
Agbaje AO, Barker AR, Tuomainen T-P (2021). LONGITUDINAL ASSOCIATIONS OF FAT MASS, LEAN MASS, BODY MASS INDEX AND BLOOD PRESSURE FROM CHILDHOOD THROUGH YOUNG ADULTHOOD WITH CAROTID-FEMORAL PULSE WAVE VELOCITY AND CAROTID INTIMA-MEDIA THICKNESS AT AGE 24.5 YEARS. Journal of the American College of Cardiology, 77(18).
Mann RH, Clarsen BM, McKay CD, Clift BC, Williams CA, Barker AR (2021). Prevalence and burden of health problems in competitive adolescent distance runners: a 6-month prospective cohort study. Journal of Sports Sciences, 39(12), 1366-1375.
Haapala EA, Barker AR, Lakka TA (2021). Response. Medicine and Science in Sports and Exercise, 53(2).
Barker A, Bond B, Duncombe S, Earle R, Stylianou M, Varley-Campbell J, Vlachopoulos D, Walker J, Weston K (2021). School-based high-intensity interval training programs in children and adolescents: a Systematic Review and Meta-Analysis. Journal of Science and Medicine in Sport, 24, s78-s79.
Constable AM, Porter JE, Benger D, Vlachopoulos D, Barker AR, Moore SA, Soininen S, Haapala EA, Westgate K, Brage S, et al (2021). The Positive Relationship between Moderate-to-Vigorous Physical Activity and Bone Mineral Content is Not Mediated by Free Leptin Index in Prepubertal Children: the PANIC Study. International Journal of Environmental Research and Public Health, 18(10), 5365-5365. Abstract.
Kranen SH, Oliveira RS, Bond B, Williams CA, Barker AR (2021). The acute effect of high‐ and moderate‐intensity interval exercise on vascular function before and after a glucose challenge in adolescents. Experimental Physiology, 106(4), 913-924.
Tomlinson OW, Denford S, Barker AR, Schneiderman JE, Campisi ES, Douglas H, Rand S, McNarry MA, Mackintosh KA, Williams CA, et al (2021). The impact of physical activity and exercise interventions for physical health in people with cystic fibrosis: protocol for a systematic review. Systematic Reviews, 10(1). Abstract.
Williams CA, Barker AR (2021). The role of physical activity, exercise, and fitness in medicine. In  (Ed) Exercise and Respiratory Diseases in Paediatrics, 1-20.

2020

Mann R, Barker A, Williams C, Clift B (2020). 307 the prevalence and burden of health problems in competitive adolescent distance runners: a prospective study in England. British Journal of Sports Medicine, 54(Suppl 1).
Bianchim MS, McNarry MA, Larun L, Barker AR, Williams CA, Mackintosh KA (2020). Calibration and validation of accelerometry using cut-points to assess physical activity in paediatric clinical groups: a systematic review. Preventive Medicine Reports, 19, 101142-101142.
Blackwood E (2020). HEALTH AND WELL-BEING OF YOUNG DINGHY SAILORS.  Abstract.
Malik AA, Williams CA, Weston KL, Barker AR (2020). Influence of personality and self-efficacy on perceptual responses during high-intensity interval exercise in adolescents. Journal of Applied Sport Psychology, 33(6), 590-608.
Agbaje AO, Barker AR, Tuomainen T-P (2020). Mediating role of cardiorespiratory fitness on the association of cardiometabolic health with endothelial function, arterial elasticity and arterial stiffness in 9-11-year olds: the ALSPAC study. Atherosclerosis, 315, e181-e182.
Tomlinson OW, Barker AR, Trott J, Oades PJ, Withers NJ, Williams CA (2020). P298 Annual changes in aerobic fitness are biased between normative equations in children and adolescents with cystic fibrosis. Journal of Cystic Fibrosis, 19, S139-S139.
Williams C, Denford S, Tomlinson O, Barker A, McNarry M, Mackintosh K, Cox N, Holland A, O'Halloran P (2020). Physical activity for cystic fibrosis: perceptions of people with cystic fibrosis, parents and healthcare professionals. ERJ Open Research, 6
Banger R (2020). The Vascular Response to Consumption of Different Sugar Types in Adolescents.  Abstract.
Tallon CM, Barker AR, Nowak-Flück D, Ainslie PN, McManus AM (2020). The influence of age and sex on cerebrovascular reactivity and ventilatory response to hypercapnia in children and adults. Exp Physiol, 105(7), 1090-1101. Abstract.  Author URL.
Koep JL, Barker AR, Banks R, Banger RR, Sansum KM, Weston ME, Bond B (2020). The reliability of a breath‐hold protocol to determine cerebrovascular reactivity in adolescents. Journal of Clinical Ultrasound, 48(9), 544-552.
Wadey CA, Weston ME, Dorobantu DM, Taylor RS, Pieles GE, Barker AR, Williams CA (2020). The role of cardiopulmonary exercise testing (CPET) in predicting mortality and morbidity in people with congenital heart disease: a systematic review and meta-analysis (Protocol). Journal of Congenital Cardiology, 4(1). Abstract.
Williams CA, Tomlinson OW, Withers NJ, Oades PJ, Barker AR (2020). WS16.4 Differences in the ventilatory response to incremental exercise in people with cystic fibrosis according to age and sex. Journal of Cystic Fibrosis, 19, S27-S28.

2019

Cox NS, Eldridge B, Rawlings S, Dreger J, Corda J, Hauser J, Button BM, Bishop J, Nichols A, Middleton A, et al (2019). A web-based intervention to promote physical activity in adolescents and young adults with cystic fibrosis: protocol for a randomized controlled trial. BMC Pulm Med, 19(1). Abstract.  Author URL.
Abdul Malik A (2019). Adolescents’ perceptual and physiological responses to high-intensity interval exercise.  Abstract.
Du Rietz E, Barker AR, Michelini G, Rommel A-S, Vainieri I, Asherson P, Kuntsi J (2019). Beneficial effects of acute high-intensity exercise on electrophysiological indices of attention processes in young adult men. Behav Brain Res, 359, 474-484. Abstract.  Author URL.
Tomlinson OW (2019). Cardiopulmonary exercise testing in the assessment and treatment of young people with cystic fibrosis.  Abstract.
Tomlinson O, Barker A, Williams C (2019). Cardiopulmonary exercise testing in young people with cystic fibrosis. The Sport and Exercise Scientist, 61, 22-22.
HAAPALA EA, WIKLUND P, LINTU N, TOMPURI T, VÄISTÖ J, FINNI T, TARKKA IM, KEMPPAINEN T, BARKER AR, EKELUND ULF, et al (2019). Cardiorespiratory Fitness, Physical Activity, and Insulin Resistance in Children. Medicine & Science in Sports & Exercise, 52(5), 1144-1152.
Farr C, Middlebrooke AR, Armstrong N, Barker AR, Fulford J, Mawson DM, McManus AM (2019). Caution with Conclusions Required: a Response to the Paper "Objectively Measured Aerobic Fitness is not related to Vascular Health Outcomes and Cardiovascular Disease Risk in 9-10 Year Old Children" response. JOURNAL OF SPORTS SCIENCE AND MEDICINE, 18(4), 831-833. Author URL.
Ubago-Guisado E, Vlachopoulos D, Barker AR, Christoffersen T, Metcalf B, Gracia-Marco L (2019). Effect of maturational timing on bone health in male adolescent athletes engaged in different sports: the PRO-BONE study. J Sci Med Sport, 22(3), 253-258. Abstract.  Author URL.
Oliveira RS, Barker AR, Debras F, Kranen SH, Williams CA (2019). Effects of exercise intensity on vascular and autonomic components of the baroreflex following glucose ingestion in adolescents. Eur J Appl Physiol, 119(4), 867-878. Abstract.  Author URL.
Dirks ML, Wall BT, Otten B, Cruz AM, Dunlop MV, Barker AR, Stephens FB (2019). High-fat Overfeeding Does Not Exacerbate Rapid Changes in Forearm Glucose and Fatty Acid Balance During Immobilization. The Journal of Clinical Endocrinology & Metabolism, 105(1), 276-289. Abstract.
Vlachopoulos D, Barker A, Williams C, Gracia-Marco L (2019). How Different Loading Sports and a 9-Month Plyometric Intervention Programme Affect Bone Turnover Markers During Adolescence: the PRO-BONE Study. the 9th Conference of Biochemistry and Physiology of Exercise.  Abstract.
Vlachopoulos D, Barker AR, Williams CA, Gracia-Marco L (2019). How Different Loading Sports and a 9-Month Plyometric Intervention Programme Affect Bone Turnover Markers During Adolescence: the PRO-BONE Study.  Abstract.
Farr C, Middlebrooke AR, Armstrong N, Barker AR, Fulford J, Mawson DM, McManus AM (2019). Objectively Measured Aerobic Fitness is Not Related to Vascular Health Outcomes and Cardiovascular Disease Risk in 9-10 Year Old Children. JOURNAL OF SPORTS SCIENCE AND MEDICINE, 18(3), 513-522. Author URL.
Denford S, Mackintosh K, McNarry M, Barker A, Williams C, Group AYU (2019). P377 Attitudes and experiences of physical activity among an international sample of people with cystic fibrosis and their support teams. Journal of Cystic Fibrosis, 18
Williams C, Tomlinson O, Withers N, Oades P, Barker A (2019). P383 Sex and age differences in aerobic fitness in people with cystic fibrosis. Journal of Cystic Fibrosis, 18, S166-S166.
Agbaje AO, Haapala EA, Lintu N, Viitasalo A, Barker AR, Takken T, Tompuri T, Lindi V, Lakka TA (2019). Peak oxygen uptake cut-points to identify children at increased cardiometabolic risk - the PANIC Study. Scand J Med Sci Sports, 29(1), 16-24. Abstract.  Author URL.
Williams CAP, Malik A, Barker A, Weston K (2019). Perceptual and Cardiorespiratory Responses to High-Intensity Interval Exercise in Adolescents: Does Work Intensity Matter?. Journal of Sports Science and Medicine
Williams CA, Barker AR, Tomlinson OW (2019). Prediction of peak oxygen uptake using the modified shuttle test - Methodological concerns and implications for clinical practice. Pediatr Pulmonol, 54(8), 1104-1105. Author URL.
Denford S, Mackintosh KA, McNarry MA, Barker AR, Williams CA (2019). Promotion of physical activity for adolescents with cystic fibrosis: a qualitative study of UK multi-disciplinary cystic fibrosis teams. Physiotherapy
Kranen SH, Bond B, Williams CA, Barker AR (2019). Reliability of low-flow vasoreactivity in the brachial artery of adolescents. Journal of Clinical Ultrasound, 47(3), 133-138. Abstract.
Bland C (2019). Sex Differences in Parameters of Cardiopulmonary Fitness and their Relationship to Clinical Outcomes in Young People with Cystic Fibrosis.  Abstract.
Koep J, Barker A, Bond B, Coombes J, Bailey T (2019). Shear stress and cerebrovascular function during acute isometric exercise: the role of exercise intensity and aging. Journal of Science and Medicine in Sport, 22
Mann RH, Williams CA, Clift BC, Barker AR (2019). The Validation of Session Rating of Perceived Exertion for Quantifying Internal Training Load in Adolescent Distance Runners. Int J Sports Physiol Perform, 14(3), 354-359. Abstract.  Author URL.
Cockcroft EJ, Bond B, Williams CA, Harris S, Jackman SR, Armstrong N, Barker AR (2019). The effects of two weeks high-intensity interval training on fasting glucose, glucose tolerance and insulin resistance in adolescent boys: a pilot study. BMC Sports Science, Medicine and Rehabilitation, 11(1). Abstract.
Cockcroft E, Bond B, Williams CA, Harris S, Jackman SR, Armstrong N, Barker AR (2019). The effects of two weeks high-intensity interval training on fasting glucose, glucose tolerance and insulin resistance in adolescent boys; a pilot study.
Koep J (2019). The influence of sugar sweetened beverage consumption on cerebrovascular function and postprandial health in adolescents.  Abstract.
Sansum KM, Weston ME, Bond B, Cockcroft EJ, O'Connor A, Tomlinson OW, Williams CA, Barker AR (2019). Validity of the Supramaximal Test to Verify Maximal Oxygen Uptake in Children and Adolescents. Pediatr Exerc Sci, 31(2), 213-222. Abstract.  Author URL.
Tomlinson OW, Barker AR, Trott J, Withers NJ, Oades PJ, Williams CA (2019). WS02-3-1 Validity of prediction equations for evaluating aerobic fitness in cystic fibrosis. Journal of Cystic Fibrosis, 18, S3-S3.

2018

Vlachopoulos D, Barker AR, Ubago-Guisado E, Williams CA, Gracia-Marco L (2018). A 9-Month Jumping Intervention to Improve Bone Geometry in Adolescent Male Athletes. Med Sci Sports Exerc, 50(12), 2544-2554. Abstract.  Author URL.
Vlachopoulos D, Barker AR, Ubago-Guisado E, Williams CA, Gracia-Marco L (2018). A 9-month Jumping Intervention to Improve Bone Acquisition in Adolescent Male Athletes. Medicine & Science in Sports & Exercise, 50(5S).
Vlachopoulos D, Barker AR, Ubago-Guisado E, Williams CA, Gracia-Marco L (2018). A 9-month Jumping Intervention to Improve Bone Acquisition in Adolescent Male Athletes: the PRO-BONE Study.  Author URL.
Cockcroft EJ, Williams CA, Jackman SR, Bassi S, Armstrong N, Barker AR (2018). A single bout of high-intensity interval exercise and work-matched moderate-intensity exercise has minimal effect on glucose tolerance and insulin sensitivity in 7- to 10-year-old boys. Journal of Sports Sciences, 36(2), 149-155. Abstract.
Ferri-Morales A, Nascimento-Ferreira MV, Vlachopoulos D, Ubago-Guisado E, Torres-Costoso A, De Moraes ACF, Barker AR, Moreno LA, Martínez-Vizcaino V, Gracia-Marco L, et al (2018). Agreement Between Standard Body Composition Methods to Estimate Percentage of Body Fat in Young Male Athletes. Pediatr Exerc Sci, 30(3), 402-410. Abstract.  Author URL.
Tomlinson OW, Barker AR, Chubbock LV, Stevens D, Saynor ZL, Oades PJ, Williams CA (2018). Analysis of oxygen uptake efficiency parameters in young people with cystic fibrosis. European Journal of Applied Physiology, 118(10), 2055-2063.
Oliveira RS, Barker AR, Williams CA (2018). Cardiac Autonomic Function, Cardiovascular Risk and Physical Activity in Adolescents. Int J Sports Med, 39(2), 89-96. Abstract.  Author URL.
Barker A, Gracia-Marco L, Vlachopoulos D, Williams C (2018). Growth, Maturation, and Physical Fitness. In Norton K, Eston R (Eds.) Kinanthropometry and Exercise Physiology, London: Routledge.
Vlachopoulos D, Barker A, Ubago-Guisado E, Williams C, Gracia-Marco L (2018). HOW DIFFERENT LOADING SPORTS AFFECT BONE DEVELOPMENT DURING ADOLESCENCE AND HOW TO IMPROVE IT? THE PRO-BONE STUDY FINDINGS.  Author URL.
Oliveira R, Barker AR, Debras F, O'Doherty A, Williams CA (2018). Mechanisms of blood pressure control following acute exercise in adolescents: Effects of exercise intensity on haemodynamics and baroreflex sensitivity. Exp Physiol, 103(8), 1056-1066. Abstract.  Author URL.
Malik AA, Williams CA, Weston KL, Barker AR (2018). Perceptual Responses to High- and Moderate-Intensity Interval Exercise in Adolescents. Med Sci Sports Exerc, 50(5), 1021-1030. Abstract.  Author URL.
Malik AA, Williams CA, Weston KL, Barker AR (2018). Perceptual and prefrontal cortex haemodynamic responses to high-intensity interval exercise with decreasing and increasing work-intensity in adolescents. Int J Psychophysiol, 133, 140-148. Abstract.  Author URL.
Barker AR, Gracia-Marco L, Ruiz JR, Castillo MJ, Aparicio-Ugarriza R, González-Gross M, Kafatos A, Androutsos O, Polito A, Molnar D, et al (2018). Physical activity, sedentary time, TV viewing, physical fitness and cardiovascular disease risk in adolescents: the HELENA study. Int J Cardiol, 254, 303-309. Abstract.  Author URL.
Tomlinson OW, Shelley J, Denford S, Barker AR, Oades PJ, Williams CA (2018). Promotion of exercise in the management of cystic fibrosis - summary of national meetings. European Journal for Person Centered Healthcare, 6(2), 196-196. Abstract.
Oliveira RS, Barker AR, Debras F, O'Doherty A, Williams CA (2018). Reliability of autonomic and vascular components of baroreflex sensitivity in adolescents. Clinical Physiology and Functional Imaging, 38(6), 986-993. Abstract.
Vlachopoulos D, Barker AR, Ubago-Guisado E, Ortega FB, Krustrup P, Metcalf B, Castro Pinero J, Ruiz JR, Knapp KM, Williams CA, et al (2018). The effect of 12-month participation in osteogenic and non-osteogenic sports on bone development in adolescent male athletes. The PRO-BONE study. J Sci Med Sport, 21(4), 404-409. Abstract.  Author URL.
Vlachopoulos D, Barker AR, Ubago-Guisado E, Williams CA, Gracia-Marco L (2018). The effect of a high-impact jumping intervention on bone mass, bone stiffness and fitness parameters in adolescent athletes. Arch Osteoporos, 13(1). Abstract.  Author URL.
Williams CA, Tomlinson OW, Chubbock LV, Stevens D, Saynor ZL, Oades PJ, Barker AR (2018). The oxygen uptake efficiency slope is not a valid surrogate of aerobic fitness in cystic fibrosis. Pediatr Pulmonol, 53(1), 36-42. Abstract.  Author URL.
Tomlinson OW, Barker AR, Chubbock LV, Stevens D, Saynor ZL, Oades PJ, Williams CA (2018). WS08.1 the utility of oxygen uptake efficiency as a marker of aerobic fitness in children with cystic fibrosis. Journal of Cystic Fibrosis, 17, S14-S14.

2017

Cockcroft EJ, Williams CA, Weaver H, O'Connor A, Jackman SR, Armstrong N, Barker AR (2017). Acute Exercise and Insulin Sensitivity in Boys: a Time-Course Study. Int J Sports Med, 38(13), 967-974. Abstract.  Author URL.
Malik AA, Williams CA, Bond B, Weston KL, Barker AR (2017). Acute cardiorespiratory, perceptual and enjoyment responses to high-intensity interval exercise in adolescents. European Journal of Sport Science, 17(10), 1335-1342.
Dormehl SJ, Robertson SJ, Barker AR, Williams CA (2017). Confirming the Value of Swimming-Performance Models for Adolescents. Int J Sports Physiol Perform, 12(9), 1177-1185. Abstract.  Author URL.
Cockcroft EJ, Moudiotis C, Kitchen J, Bond B, Williams CA, Barker AR (2017). High-intensity interval exercise and glycemic control in adolescents with type one diabetes mellitus: a case study. Physiol Rep, 5(13). Abstract.  Author URL.
Oliveira RS, Barker AR, Wilkinson KM, Abbott RA, Williams CA (2017). Is cardiac autonomic function associated with cardiorespiratory fitness and physical activity in children and adolescents? a systematic review of cross-sectional studies. Int J Cardiol, 236, 113-122. Abstract.  Author URL.
Vlachopoulos D, Barker AR, Ubago-Guisado E, Fatouros IG, Knapp KM, Williams CA, Gracia-Marco L (2017). Longitudinal Adaptations of Bone Mass, Geometry, and Metabolism in Adolescent Male Athletes: the PRO-BONE Study. J Bone Miner Res, 32(11), 2269-2277. Abstract.  Author URL.
Williams CA, Saynor ZL, Barker AR, Oades PJ, Tomlinson OW (2017). Measurement of V̇o2max in clinical groups is feasible and necessary. J Appl Physiol (1985), 123(4). Author URL.
Bond B, Weston KL, Williams CA, Barker AR (2017). Perspectives on high-intensity interval exercise for health promotion in children and adolescents. Open Access J Sports Med, 8, 243-265. Abstract.  Author URL.
Tomlinson OW, Barker AR, Oades PJ, Williams CA (2017). Scaling the Oxygen Uptake Efficiency Slope for Body Size in Cystic Fibrosis. Med Sci Sports Exerc, 49(10), 1980-1986. Abstract.  Author URL.
Vlachopoulos D, Barker, Williams CA, Arngrímsson SA, Knapp KM, Metcalf B, Fatouros IG, Moreno LA, Gracia Marco (2017). The impact of sport participation on bone mass and geometry in adolescent males. Medicine and Science in Sports and Exercise
Bond B, Williams CA, Barker AR (2017). The reliability of a single protocol to determine endothelial, microvascular and autonomic functions in adolescents. Clin Physiol Funct Imaging, 37(6), 703-709. Abstract.  Author URL.

2016

Vlachopoulos D, Gracia-Marco L, Barker AR, Huybrechts I, Moreno LA, Mouratidou T (2016). Bone health: the independent and combined effects of calcium, Vitamin D and exercise in children and adolescents. In  (Ed) Food and Nutritional Components in Focus, 530-546.  Abstract.
Fessi MS, Zarrouk N, Di Salvo V, Filetti C, Barker AR, Moalla W (2016). Effects of tapering on physical match activities in professional soccer players. J Sports Sci, 34(24), 2189-2194. Abstract.  Author URL.
Tomlinson OW, Barker AR, Oades PJ, Williams CA (2016). Exercise capacity following a percutaneous endoscopic gastrostomy in a young female with cystic fibrosis: a case report. Physiological Reports, 4(16). Abstract.
Saynor ZL, Barker AR, Oades PJ, Williams CA (2016). Impaired Pulmonary V˙O2 Kinetics in Cystic Fibrosis Depend on Exercise Intensity. Med Sci Sports Exerc, 48(11), 2090-2099. Abstract.  Author URL.
Saynor ZL, Barker AR, Oades PJ, Tomlinson OW, Williams CA (2016). Validity and Reliability Concerns Associated with Cardiopulmonary Exercise Testing Young People with Cystic Fibrosis. Respiration, 92(1), 61-62.

2015

Bond B, Williams CA, Jackman SR, Woodward A, Armstrong N, Barker AR (2015). Accumulating exercise and postprandial health in adolescents. Metabolism: clinical and experimental Abstract.
McNarry MA, Farr C, Middlebrooke A, Welford D, Breese B, Armstrong N, Barker AR (2015). Aerobic Function and Muscle Deoxygenation Dynamics during Ramp Exercise in Children. Med Sci Sports Exerc, 47(9), 1877-1884. Abstract.  Author URL.
Vlachopoulos D, Barker AR, Williams CA, Knapp KM, Metcalf BS, Gracia-Marco L (2015). Effect of a program of short bouts of exercise on bone health in adolescents involved in different sports: the PRO-BONE study protocol. BMC Public Health, 15 Abstract.  Author URL.
Bond B, Williams CA, Isic C, Jackman SR, Tolfrey K, Barrett LA, Barker AR (2015). Exercise intensity and postprandial health outcomes in adolescents. Eur J Appl Physiol, 115(5), 927-936. Abstract.  Author URL.
Bond B, Gates PE, Jackman SR, Corless LM, Williams CA, Barker AR (2015). Exercise intensity and the protection from postprandial vascular dysfunction in adolescents. Am J Physiol Heart Circ Physiol, 308(11), H1443-H1450. Abstract.  Author URL.
Armstrong N, Barker AR, McManus AM (2015). Muscle metabolism changes with age and maturation: How do they relate to youth sport performance?. British Journal of Sports Medicine, 49(13), 860-864. Abstract.
Armstrong N, Barker AR, McManus AM (2015). Muscle metabolism changes with age and maturation: How do they relate to youth sport performance?. Br J Sports Med, 49(13), 860-864. Abstract.  Author URL.
Bond B, Cockcroft EJ, Williams CA, Harris S, Gates PE, Jackman SR, Armstrong N, Barker AR (2015). Two weeks of high-intensity interval training improves novel but not traditional cardiovascular disease risk factors in adolescents. Am J Physiol Heart Circ Physiol, 309(6), H1039-H1047. Abstract.  Author URL.

2014

Williams CA, Saynor ZL, Tomlinson OW, Barker AR (2014). Cystic fibrosis and physiological responses to exercise. Expert Rev Respir Med, 8(6), 751-762. Abstract.  Author URL.
Cockcroft EJ, Williams CA, Tomlinson OW, Vlachopoulos D, Jackman SR, Armstrong N, Barker AR (2014). High intensity interval exercise is an effective alternative to moderate intensity exercise for improving glucose tolerance and insulin sensitivity in adolescent boys. Journal of Science and Medicine in Sport Abstract.
Saynor ZL, Barker AR, Oades PJ, Williams CA (2014). Impaired aerobic function in patients with cystic fibrosis during ramp exercise. Med Sci Sports Exerc, 46(12), 2271-2278. Abstract.  Author URL.
Breese BC, Barker AR, Armstrong N, Fulford J, Williams CA (2014). Influence of thigh activation on the VO₂ slow component in boys and men. Eur J Appl Physiol, 114(11), 2309-2319. Abstract.  Author URL.
Breese BC, Barker AR, Armstrong N, Fulford J, Williams CA (2014). Influence of thigh activation on the [Formula Presented] O<inf>2</inf> slow component in boys and men. European Journal of Applied Physiology, 114(11), 2309-2319. Abstract.
Breese BC, Barker AR, Armstrong N, Fulford J, Williams CA (2014). Influence of thigh muscle activation on pulmonary O2 uptake kinetics during very heavy intensity exercise in boys and men. European Journal of Applied Physiology, 114, 2309-2319. Abstract.
Willcocks RJ, Fulford J, Armstrong N, Barker AR, Williams CA (2014). Muscle metabolism during fatiguing isometric quadriceps exercise in adolescents and adults. Appl Physiol Nutr Metab, 39(4), 439-445. Abstract.  Author URL.
Saynor ZL, Barker AR, Oades PJ, Williams CA (2014). The effect of ivacaftor in adolescents with cystic fibrosis (G551D mutation): an exercise physiology perspective. Pediatr Phys Ther, 26(4), 454-461. Abstract.  Author URL.
Barker AR, Trebilcock E, Breese B, Jones AM, Armstrong N (2014). The effect of priming exercise on O2 uptake kinetics, muscle O2 delivery and utilization, muscle activity, and exercise tolerance in boys. Appl Physiol Nutr Metab, 39(3), 308-317. Abstract.  Author URL.
Barker AR, Day J, Smith A, Bond B, Williams CA (2014). The influence of 2 weeks of low-volume high-intensity interval training on health outcomes in adolescent boys. J Sports Sci, 32(8), 757-765. Abstract.  Author URL.
Fulford J, Liepa A, Barker AR, Meakin JR (2014). The reliability of 31P-MRS and NIRS measurements of spinal muscle function. International Journal of Sports Medicine, 35(13), 1078-1083. Abstract.
Willcocks RJ, Fulford J, Barker AR, Armstrong N, Williams CA (2014). Two protocols to measure mitochondrial capacity in women and adolescent girls: a 31P-MRS preliminary study. Pediatr Exerc Sci, 26(2), 210-217. Abstract.  Author URL.

2013

Saynor ZL, Barker AR, Oades PJ, Williams CA (2013). A protocol to determine valid V˙O2max in young cystic fibrosis patients. J Sci Med Sport, 16(6), 539-544. Abstract.  Author URL.
Saynor ZL, Barker AR, Oades PJ, Williams CA (2013). A protocol to determine valid V̇O2max in young cystic fibrosis patients. Journal of Science and Medicine in Sport, 16(6), 539-544. Abstract.
Nimmerichter A, Holdhaus J, Mehnen L, Vidotto C, Loidl M, Barker AR (2013). Effects of negative air ions on oxygen uptake kinetics, recovery and performance in exercise: a randomized, double-blinded study. International Journal of Biometeorology, 1-10. Abstract.
Saynor ZL, Barker AR, Oades PJ, Williams CA (2013). Reproducibility of maximal cardiopulmonary exercise testing for young cystic fibrosis patients. Journal of Cystic Fibrosis, 12(6), 644-650. Abstract.
Saynor ZL, Barker AR, Oades PJ, Williams CA (2013). Reproducibility of maximal cardiopulmonary exercise testing for young cystic fibrosis patients. J Cyst Fibros, 12(6), 644-650. Abstract.  Author URL.

2012

Saynor ZL, Barker AR, Oades PJ, Williams CA (2012). 168 a protocol to determine O2max in young patients with cystic fibrosis: recommendations for clinical practice. Journal of Cystic Fibrosis, 11
Barker AR, Armstrong N (2012). Aerobic Power, Tests of. In  (Ed) Encyclopedia of Exercise Medicine in Health and Disease, 32-37.
Barker AR, Bond B, Toman C, Williams CA, Armstrong N (2012). Critical power in adolescents: physiological bases and assessment using all-out exercise. Eur J Appl Physiol, 112(4), 1359-1370. Abstract.  Author URL.
Armstrong N, Barker AR (2012). New insights in paediatric exercise metabolism. JOURNAL OF SPORT AND HEALTH SCIENCE, 1(1), 18-26. Author URL.
Breese BC, Barker AR, Armstrong N, Jones AM, Williams CA (2012). The effect of baseline metabolic rate on pulmonary O₂ uptake kinetics during very heavy intensity exercise in boys and men. Respir Physiol Neurobiol, 180(2-3), 223-229. Abstract.  Author URL.
Williams CA, Saynor ZL, Barker AR, Oades PJ (2012). WS16.2 the reliability of maximal cardiopulmonary exercise testing for young cystic fibrosis patients. Journal of Cystic Fibrosis, 11

2011

Barker AR, Bond B, Toman C, Williams CA, Armstrong N (2011). Critical power in adolescents: physiological bases and assessment using all-out exercise. European Journal of Applied Physiology, 1-12.
Armstrong N, Barker AR (2011). Endurance Training and Elite Young Athletes. Medicine and Sport Science, 56, 59-83. Abstract.
Barker AR, Williams CA, Jones AM, Armstrong N (2011). Establishing maximal oxygen uptake in young people during a ramp cycle test to exhaustion. British Journal of Sports Medicine, 45(6), 498-503. Abstract.
Barker AR, Armstrong N (2011). Exercise testing elite young athletes. Med Sport Sci, 56, 106-125. Abstract.  Author URL.
Breese BC, Armstrong N, Barker AR, Williams CA (2011). The effect of pedal rate on pulmonary O2 uptake kinetics during very heavy intensity exercise in trained and untrained teenage boys. Respir Physiol Neurobiol, 177(2), 149-154. Abstract.  Author URL.

2010

Willcocks RJ, Williams CA, Barker AR, Fulford J, Armstrong N (2010). Age- and Sex- Related Differences in Muscle Phosphocreatine and Oxygenation Kinetics during High Intensity Exercise in Adolescents and Adults. Nuclear Magnetic Resonance in Biomedicine
Willcocks RJ, Williams CA, Barker AR, Fulford J, Armstrong N (2010). Age- and sex-related differences in muscle phosphocreatine and oxygenation kinetics during high-intensity exercise in adolescents and adults. NMR Biomed, 23(6), 569-577. Abstract.  Author URL.
Berthoin S, Dupont G, Baquet G (2010). Commentaries on Viewpoint: Do oxidative and anaerobic energy production in exercising muscle change throughout growth and maturation? Manifestations of a common underlying cause. Journal of applied physiology (Bethesda, Md. : 1985), 109(5).
Armstrong N, Barker AR (2010). Endurance training and elite young athletes. , 56, 59-83. Abstract.
Barker AR, Armstrong N (2010). Exercise Testing Elite Young Athletes. Medicine and Sport Science, 56, 106-125.
Barker AR, Armstrong N (2010). Insights into Development Muscle Metabolism through the Use of 31P-Magnetic Resonance Spectroscopy. Pediatric Exercise Science
Barker AR, Armstrong N (2010). Insights into developmental muscle metabolism through the use of 31P-magnetic resonance spectroscopy: a review. Pediatr Exerc Sci, 22(3), 350-368. Abstract.
Barker AR, Armstrong N (2010). Insights into developmental muscle metabolism through the use of <sup>31</sup>P-magnetic resonance spectroscopy: a review. Pediatric Exercise Science, 22(3), 350-368. Abstract.
Breese BC, Williams CA, Barker AR, Weisman JR, Fawkner SG, Armstrong N (2010). Longitudinal Changes in the Oxygen Uptake Kinetic Response to Heavy-Intensity Exercise in 14- to 16-Year-Old Boys (Reprinted from PES, vol 22). PEDIATRIC EXERCISE SCIENCE, 22(2), 314-325. Author URL.
Breese BC, Williams CA, Barker AR, Welsman JR, Fawkner SG, Armstrong N (2010). Longitudinal change in the oxygen uptake kinetic response to heavy-intensity exercise in 14- to 16-years-old boys. Pediatr Exerc Sci, 22(2), 314-325.
Breese BC, Williams CA, Barker AR, Welsman JR, Fawker SG, Armstrong N (2010). Longitudinal changes in the oxygen uptake kinetic response to heavy-intensity exercise in 14- to 16-year-old boys. Pediatric Exercise Science, 22(1), 69-80.
Barker AR, Welsman JR, Welford D, Fulford J, Armstrong N (2010). Quadriceps muscle energetics during an incremental test to exhaustion in children and adults. Medicine and Science in Sports and Exercise
Barker AR, Welsman JR, Fulford J, Welford D, Armstrong N (2010). Quadriceps muscle energetics during incremental exercise in children and adults. Med Sci Sports Exerc, 42(7), 1303-1313. Abstract.  Author URL.
Barker AR, Breese BC, Willcocks RJ, Williams CA, Armstrong N (2010). The importance of exercise intensity when studying developmental energy metabolism. Journal of Applied Physiology, 109(5), 1565-1566.
Barker AR, Jones AM, Armstrong N (2010). The influence of priming exercise on oxygen uptake, cardiac output, and muscle oxygenation kinetics during very heavy-intensity exercise in 9- to 13-yr-old boys. J Appl Physiol (1985), 109(2), 491-500. Abstract.  Author URL.

2009

Williams CA, Willcocks RJ, Barker AR, Fulford J, Armstrong N (2009). Muscle Phosphocreatine Kinetics in Children and Adults During High-intensity Exercise. Medicine & Science in Sports & Exercise, 41(5).
Armstrong N, Barker AR (2009). Oxygen uptake kinetics in children and adolescents: a review. Pediatr Exerc Sci, 21(2), 130-147. Abstract.  Author URL.

2008

Willcocks RJ, Barker AR, Fulford J, Welford D, Welsman JR, Armstrong N, Williams CA (2008). Kinetics of Phosphocreatine and Deoxyhemoglobin in Children and Adults During High-Intensity Exercise. MEDICINE AND SCIENCE IN SPORTS AND EXERCISE, 40(5), S20-S20. Author URL.
Barker AR, Welsman JR, Fulford J, Welford D, Williams CA, Armstrong N (2008). Muscle phosphocreatine and pulmonary oxygen uptake kinetics in children at the onset and offset of moderate intensity exercise. Eur J Appl Physiol, 102(6), 727-738. Abstract.  Author URL.
Barker AR, Welsman JR, Fulford J, Welford D, Armstrong N (2008). Muscle phosphocreatine kinetics in children and adults at the onset and offset of moderate-intensity exercise. J Appl Physiol (1985), 105(2), 446-456. Abstract.  Author URL.
Barker AR, Welsman JR, Fulford J, Welford D, Armstrong N (2008). Quadriceps Muscle Phosphocreatine and Deoxygenation Kinetics in Children and Adults at the Onset of Moderate Intensity Exercise. MEDICINE AND SCIENCE IN SPORTS AND EXERCISE, 40(5), S20-S20. Author URL.
Williams CA, Willcocks RJ, Barker AR, Fulford J, Welford D, Welsman JR, Armstrong N (2008). Recovery of Muscle Oxygenation and Phosphocreatine in Children and Adults Following High-Intensity Quadriceps Exercise. MEDICINE AND SCIENCE IN SPORTS AND EXERCISE, 40(5), S20-S20. Author URL.

2006

Tolfrey K, Barker A, Thom JM, Morse CI, Narici MV, Batterham AM (2006). Quantification of active muscle mass during experimental exercise - Reply. J APPL PHYSIOL, 101(5), 1535-1535.
Barker A, Welsman J, Welford D, Fulford J, Williams C, Armstrong N (2006). Reliability of 31P-magnetic resonance spectroscopy during an exhaustive incremental exercise test in children. Eur J Appl Physiol, 98(6), 556-565. Abstract.  Author URL.
Barker A, Welsman J, Welford D, Fulford J, Williams C, Armstrong N (2006). Reliability of <sup>31</sup>P-magnetic resonance spectroscopy during an exhaustive incremental exercise test in children. European Journal of Applied Physiology, 98(6), 556-565. Abstract.
Tolfrey K, Barker A, Thom JM, Morse CI, Narici MV, Batterham AM (2006). Scaling maximum oxygen uptake using lower leg muscle volume provides further insight into the pitfalls of whole body-mass power laws - Reply. JOURNAL OF APPLIED PHYSIOLOGY, 101(3), 1007-1007. Author URL.
Tolfrey K, Barker A, Thom JM, Morse CI, Narici MV, Batterham AM (2006). Scaling of maximal oxygen uptake by lower leg muscle volume in boys and men. J Appl Physiol (1985), 100(6), 1851-1856. Abstract.  Author URL.

Alan_Barker Details from cache as at 2021-11-28 08:40:18

Refresh publications

External Engagement and Impact

Awards/Honorary fellowships

2012 Fellow of the Higher Education Academy

2011 Sport and Health Sciences student teaching award for ‘Best feedback provider’ and ‘Inspiring use of research in teaching’. Runner-up for ‘Best overall lecturer’.

2008 Elsevier student oral presentation award (1st place). British Association of Sport and Exercise Science Annual Conference, Bath, England.

2007 Runner-up student oral presentation. XXIV Pediatric Work Physiology Meeting. Tallinn, Estonia.

2007 Graduate teaching award for ‘Excellence in Teaching’. School of Sport and Health Sciences, University of Exeter.

2003 Physiological Society undergraduate dissertation award


Committee/panel activities

Member of the British Association of Sport and Exercise Sciences

Member of the Physiological Society

Member of the Higher Education Academy


Editorial responsibilities

I regularly act as a reviewer for the following journals:

Current Respiratory Medicine Reviews
European Journal of Applied Physiology
Journal of Applied Physiology
Journal of Sports Sciences
Medicine and Sport Science
Medicine and Science in Sports and Exercise
Physician and Sportsmedicine
Applied Physiology, Nutrition and Metabolism
Acta Paediatrica
Pediatric Exercise Science


Invited lectures

Barker, A.R. (2008). Advanced measurement in paediatric exercise science: Magnetic resonance spectroscopy. BASES workshop on ‘Advanced measurement in paediatric exercise science’, University of Exeter.

Barker, A.R. (2009). In-vivo interrogation of muscle metabolism during exercise in children using 31P-magnetic resonance spectroscopy. Presented at the BASES Annual Conference, Leeds Metropolitan University, UK, as part of the BASES Fellow Symposium ‘Advances in Paediatric Exercise Science: Lessons from the Past’. Co-presenters included Professor Craig Williams and Professor Jo Doust.

Barker, A.R. (2010). In-vivo interrogation of muscle metabolism during exercise in children using 31P-magnetic resonance spectroscopy: Lessons from CHERC. Presented at the Peninsula Paediatric Research Symposium.

Barker, A.R. (2011). Training young people: is there a golden period? Presented at the 4th Annual SportsMed South West conference.

Barker, A.R. (2011). Physical activity, fitness and health in young people. Presented at the International Summer School. University of Exeter.

Barker, A.R. (2012). Endurance training young athletes. Presented at the International Seminar on ‘Training during the evolutive age’ for the Italian Olympic Committee, Rome, Italy.

Barker, A.R. (2012). The physiological basis of endurance training in young people. Presented at the IAAF Youth Athletes Conference, Barcelona, Spain.

Barker, A.R. (2012). Sport and Health of Young People. Presented at the International Summer School on Sport, Performance and the Olympic games. University of Exeter. UK.

Barker, A.R. (2012). Non-invasive insights into paediatric muscle metabolic during exercise. Beyond 2012: The 7th Researching Youth Sport Conference. Loughborough University, UK.


Workshops/Conferences organised

Organising and scientific committee for the XXVII European Group of Pediatric Work Physiology

Organiser and presenter at the BASES workshop on ‘Advanced measurement in paediatric exercise science’, University of Exeter

Teaching

Responsibilities:

  • Programme Director MSc Sport and Health Sciences
  • Programme Director MSc Paediatric Exercise and Health
  • BSc Sport and Exercise Sciences Year Tutor
  • BSc Sport and Exercise Sciences Senior Tutor
  • Education Strategy Group

Teaching modules:

  • ESS3703 (BSC) Paediatric Exercise Physiology module convener
  • SHSM003 (MSc) Paediatric Exercise Physiology module convener
  • SHSM014 (MSc) Paediatric Exercise and Health module convener

I am a Fellow of Higher Education Academy.

Modules

2021/22


Supervision / Group

Postgraduate researchers

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