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Dr Alan Barker

Dr Alan Barker

Senior Lecturer in Paediatric Exercise 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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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 Full text.
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 Full text.
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 Full text.
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 Full text.
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 Full text.
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 Full text.
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 Full text.
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.  Full text.
Vlachopoulos D, Barker, Williams CA, Arngrímsson SA, Knapp KM, Metcalf B, Fatouros IG, Moreno LA, Gracia Marco (In Press). The impact of sport participation on bone mass and geometry in adolescent males. Medicine and Science in Sports and Exercise Full text.
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 Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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 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.  Full text.
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.  Full text.
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 Full text.
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.  Full text.
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 Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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. Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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. Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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. Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
Cockcroft EJ, Williams CA, Tomlinson OW, Vlachopoulos D, Jackman SR, Armstrong N, Barker AR (2015). 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, 18(6), 720-724. Abstract.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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 Full text.
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.
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.  Full text.
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. Full text.
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.
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

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.  Full text.

Conferences

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.  Full text.

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 Full text.
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 Full text.
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 Full text.
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 Full text.
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 Full text.
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 Full text.
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 Full text.
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.  Full text.
Vlachopoulos D, Barker, Williams CA, Arngrímsson SA, Knapp KM, Metcalf B, Fatouros IG, Moreno LA, Gracia Marco (In Press). The impact of sport participation on bone mass and geometry in adolescent males. Medicine and Science in Sports and Exercise Full text.
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 Full text.

2019

Abdul Malik A (2019). Adolescents’ perceptual and physiological responses to high-intensity interval exercise.  Abstract.  Full text.
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.  Full text.
Tomlinson OW (2019). Cardiopulmonary exercise testing in the assessment and treatment of young people with cystic fibrosis.  Abstract.  Full text.
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.  Full text.
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.  Full text.
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 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.  Full text.
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.  Full text.
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 Full text.
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.  Full text.
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 Full text.
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.  Full text.
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.  Full text.
Koep J (2019). The influence of sugar sweetened beverage consumption on cerebrovascular function and postprandial health in adolescents.  Abstract.  Full text.
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.  Full text.

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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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. Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.

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.  Full text.
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. Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.

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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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. Full text.

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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
Cockcroft EJ, Williams CA, Tomlinson OW, Vlachopoulos D, Jackman SR, Armstrong N, Barker AR (2015). 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, 18(6), 720-724. Abstract.
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.  Full text.
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.  Full text.

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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.
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.  Full text.

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.  Full text.
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.  Full text.
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.  Full text.

2012

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.  Full text.

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.  Full text.
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 Full text.
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.
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.  Full text.
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. Full text.
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

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 2019-11-22 03:18:00

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

2019/20


Supervision / Group

Postgraduate researchers

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