Dr Alan Barker
Senior Lecturer in Paediatric Exercise and Health

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. DOI.
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. DOI.
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. DOI.
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. DOI.

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. DOI.
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.
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.
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.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
Williams CA, Saynor ZL, Barker AR, Oades PJ, Tomlinson OW (2017). Measurement of V̇o2maxin clinical groups is feasible and necessary. J Appl Physiol (1985), 123(4). Author URL.  Full text. DOI.
Malik AA, Williams CA, Weston KL, Barker AR (2017). Perceptual Responses to High- and Moderate-Intensity Interval Exercise in Adolescents. Med Sci Sports Exerc Abstract.  Author URL.  Full text. DOI.
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. DOI.
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. DOI.
Vlachopoulos D, Barker AR, Ubago-Guisado E, Ortega FB, Krustrup P, Metcalf B, Castro Pinero J, Ruiz JR, Knapp KM, Williams CA, et al (2017). 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 Abstract.  Author URL.  Full text. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
Breese BC, Barker AR, Armstrong N, Fulford J, Williams CA (2014). Influence of thigh activation on the [Formula Presented] O2 slow component in boys and men. European Journal of Applied Physiology, 114(11), 2309-2319. Abstract.  Full text. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
Loidl M, Barker AR, Nimmerichter A, Holdhaus J, Mehnen L, Vidotto C (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. DOI.
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. DOI.
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. DOI.
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. DOI.
Armstrong N, Barker AR (2012). New insights in paediatric exercise metabolism. JOURNAL OF SPORT AND HEALTH SCIENCE, 1(1), 18-26. Author URL. DOI.
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. DOI.
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. DOI.
Barker AR, Armstrong N (2011). Exercise testing elite young athletes. Med Sport Sci, 56, 106-125. Abstract.  Author URL. DOI.
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. DOI.
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. DOI.
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. DOI.
Armstrong N, Barker AR (2010). Endurance training and elite young athletes. , 56, 59-83. Abstract. DOI.
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.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.

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. DOI.

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. DOI.
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.
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.
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.

2018

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. DOI.
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. DOI.
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. DOI.
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. DOI.

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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
Williams CA, Saynor ZL, Barker AR, Oades PJ, Tomlinson OW (2017). Measurement of V̇o2maxin clinical groups is feasible and necessary. J Appl Physiol (1985), 123(4). Author URL.  Full text. DOI.
Malik AA, Williams CA, Weston KL, Barker AR (2017). Perceptual Responses to High- and Moderate-Intensity Interval Exercise in Adolescents. Med Sci Sports Exerc Abstract.  Author URL.  Full text. DOI.
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. DOI.
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. DOI.
Vlachopoulos D, Barker AR, Ubago-Guisado E, Ortega FB, Krustrup P, Metcalf B, Castro Pinero J, Ruiz JR, Knapp KM, Williams CA, et al (2017). 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 Abstract.  Author URL.  Full text. DOI.
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. DOI.

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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.

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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.

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. DOI.
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. DOI.
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. DOI.
Breese BC, Barker AR, Armstrong N, Fulford J, Williams CA (2014). Influence of thigh activation on the [Formula Presented] O2 slow component in boys and men. European Journal of Applied Physiology, 114(11), 2309-2319. Abstract.  Full text. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.

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. DOI.
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. DOI.
Loidl M, Barker AR, Nimmerichter A, Holdhaus J, Mehnen L, Vidotto C (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. DOI.
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. DOI.
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. DOI.

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. DOI.
Armstrong N, Barker AR (2012). New insights in paediatric exercise metabolism. JOURNAL OF SPORT AND HEALTH SCIENCE, 1(1), 18-26. Author URL. DOI.
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. DOI.

2011

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. DOI.
Barker AR, Armstrong N (2011). Exercise testing elite young athletes. Med Sport Sci, 56, 106-125. Abstract.  Author URL. DOI.
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. DOI.

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. DOI.
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. DOI.
Armstrong N, Barker AR (2010). Endurance training and elite young athletes. , 56, 59-83. Abstract. DOI.
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.
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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.

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. DOI.
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. DOI.
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. DOI.
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. DOI.
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. DOI.

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. DOI.
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. DOI.
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. DOI.
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. DOI.