School:Psychology and Sport Science
Areas of Expertise: Sport and exercise sciences
Justin is an Associate Professor in Health and Exercise Nutrition with a focus on applied and health-based nutrition. His interests encompass a wide range of areas including how both dietary and nutrient interventions can impact on adaptations to exercise, both in terms of physiological and metabolic health, as well as enhancing recovery.
Justin joined Anglia Ruskin University in 2014, and is an Associate Professor and nutritional physiology researcher with our Cambridge Centre for Sport and Exercise Sciences. He is a Registered Nutritional Therapist with the British Association for Nutrition and Lifestyle Medicine (BANT) and the Complementary and Natural Healthcare Council (CNHC); as well as being an accredited Sport and Exercise Physiologist and Chartered Scientist with the British Association of Sport and Exercise Sciences (BASES).
With over 20 years’ experience in sport and exercise physiology and nutrition, Justin has worked at various institutions including the British Olympic Medical Centre (London), Brunel University (where he completed his PhD), Victoria University (Melbourne) and the University of Hertfordshire. He currently holds a research post at Anglia Ruskin University, and additionally is the Program Leader for Muscle and Mobility platforms at Danone Nutricia Research, within the Nutritional Physiology and Functional Nutrients department.
Justins’ research focuses on applied nutritional physiology, exploring dietary and nutrient strategies to support exercise training and recovery, muscular adaptations (pertinent to physical development and sarcopenia) and cardio-metabolic health. His current research interests explore ‘calorie- restriction-mimetic’ and polyphenol phytonutrients on physiological mechanisms associated with fat oxidation and cardio-metabolic health; as well as nutrition factors aligned with the ‘muscle-gut-brain’ axis, in particular probiotic and protein interventions to support muscle recovery and adaptations to exercise.
PhD supervision (4 completions, 3 current)
MSc/MRes supervision (25 completions)
Anglia Ruskin University
University of Hertfordshire
Previous teaching experience
MOD005696 Performance & Exercise Nutrition (Module Leader – level 6)
MOD005682 Nutrition for Health & Exercise (Module Leader – level 5)
MOD007156 Multidisciplinary Sport & Exercise Science 2 (Module Leader - level 4)
MOD006260 Interpretation & Integration of Sports Science Data for Coaching (Module Leader – level 5)
Journal Reviewer including: Beverages, British Food Journal, European Journal of Clinical Nutrition, Frontiers in Nutrition, Journal of Applied Physiology, Journal of Dietary Supplements, Journal of the International Society of Sports Nutrition, Journal of Sport and Health Science, International Journal for Sports Nutrition and Exercise Metabolism, Medicine and Science in Sport and Exercise, Nutrients
Research Grants and Projects
2022: Metabolic fate of plant-based proteins. Danone Nutricia Research, Netherlands. (PI)
2021: The efficacy of a home-use metabolic device (Lumen) in response to a short-term low and high carbohydrate diet in healthy volunteers. MetaFlow Ltd, Israel. (PI)
2020: Investigating the impact of a natural antioxidant food product on exercise-induced oxidative stress in recreationally active participants. Fattoria La Vialla, Italy. (PI)
2019: Assessment of Dietary Intake in British Army Recruits, and the Influence of Protein Supplementation on Training Adaptations (HQ Army Recruiting and Training Division, Occupational Medicine). MOD funded doctoral programme. (PI)
2019: GlycA as a novel biomarker linking bacterial-mediated inflammation to adverse cardiometabolic and cardiovascular traits in the young. University College London/British Heart Foundation collaboration (Co-I).
2019: Assessing the impact of a natural food ingredient on vitamin D levels in healthy volunteers. Cambridge Commodities Ltd (PI)
2018: The Effect of Green Tea Supplementation Strategies on Fat Oxidation and Body Composition in Overweight Individuals. Biocare Ltd (PI)
2018: Satiating effect of high protein diets on resistance-trained subjects in energy deficit. Institute of Nutrition and Fitness Sciences (INFS) (PI)
2018: Anglia Ruskin University, University Sabbatical Scheme.
2016: The effect of protein intake on recovery after strength training in resistance-trained subjects. Bayesian Bodybuilding R&D Ltd (PI)
2016: Creating High-performance Business Leadership through Enhanced Resilience. Anglia Ruskin University, Life Science Development Fund (Joint staff)
2015: Enhancing the student experience, engagement and academic performance through involvement in research projects. Anglia Ruskin University, Learning and Teaching Project Award (Joint staff)
2014: The use of probiotic supplementation on gastrointestinal endotoxemia in endurance runners. Biocare Ltd (PI)
2013: The Influence of Dietary Intake on Functional Nutrition Biomarkers and Exercise Performance in Recreationally Trained Individuals. Genova Diagnostics Ltd (PI)
2013: The influence of green tea extract on fat oxidation in healthy volunteers. High5 Sports Nutrition Ltd (PI)
2013: A multi-study investigation into the effects of ultra-endurance training within a recreationally active population. University of Hertfordshire Diamond Fund Award (PI)
2012: The effect of combined glucose, fructose and protein formulas on exercise performance in recreation athletes. High5 Sports Nutrition Ltd (PI)
2011: The effect of a commercial sports drink on exercise performance in healthy athletes. Maxinutrition Ltd (PI)
Consultancy and External Examiner Roles:
BASES Laboratory Director, Performance and Exercise Testing Consultancy Unit, Anglia Ruskin University (2017-2022)
BASES Laboratory Director (University of Hertfordshire & Brunel University)
Senior Nutrition Advisor, Football Association, England Men's Football
Senior Nutrition Advisor, Manchester City Football Club, Senior Men's Squad
External Examiner, University of West London (Nutritional Therapy): 2014-2019
[>70 Peer-reviewed scientific papers, book chapters and media articles; >70 Conference Proceedings]
Chiesa, S., Charakida, M., Georgiopoulos, G., Roberts, J., Stafford, S., Park, C., Mykkanen, J., Kahonen, M., Lehtimaki, T., Ala-Korpela, M., Raitakari, O., Pietiainen, M., Pussinen, P., Muthurangu, V., Hughes, A., Sattar, N., Timpson, N., Deanfield, J. (2022). Glycoprotein Acetyls: A Novel Inflammatory Biomarker of Early Cardiovascular Risk in the Young. Journal of the American Heart Association. 11:e024380. doi: 10.1161/JAHA.121.024380.
Furber, M., Pyle, S., Roberts, M., Roberts J. (2021). Comparing Acute, High Dietary Protein and Carbohydrate Intake on Transcriptional Biomarkers, Fuel Utilisation and Exercise Performance in Trained Male Runners. Nutrients.13(12):4391. doi: 10.3390/nu13124391.
Chung, H., Roberts, J., Gordon, D., Keiler, D. (2021). Do exercise-associated genes explain phenotypic variance in the three components of fitness? A Systematic review & Meta-analysis. PLoS ONE 16(10): e0249501. doi: 10.1371/journal.pone.0249501.
Vaughan, M, Trott, M, Sapkota, R, Premi, G, Roberts, J, Ubhi, J, et al. (2021) Changes in 25-hydroxyvitamin D levels post-vitamin D supplementation in people of Black and Asian ethnicities and its implications during COVID-19 pandemic: a systematic review. Journal of Human Nutrition and Dietetics; 1– 11. doi: 10.1111/jhn.12949.
Chapman, S., Chung, H.C., Rawcliffe, A.J., Izard, R., Smith, L., and Roberts, J.D. (2021). Does Protein Supplementation Support Adaptations to Arduous Concurrent Exercise Training? A Systematic Review and Meta-Analysis with Military Based Applications. Nutrients 2021, 13, 1416. doi: 10.3390/nu13051416.
Shil A, Davies C, Gautam L, Roberts J, Chichger H. (2021). Investigating the Opposing Effect of Two Different Green Tea Supplements on Oxidative Stress, Mitochondrial Function and Cell Viability in HepG2 Cells. J Diet Suppl. 2021 Mar 17:1-24. doi: 10.1080/19390211.2021.1894304.
Roberts, J.D., Willmott, A.G.B., Beasley, L., Boal, M., Davies, R., Martin, L., Chichger, H., Gautam, L., Del Coso, J. (2021). The Impact of Decaffeinated Green Tea Extract on Fat Oxidation, Body Composition and Cardio-Metabolic Health in Overweight, Recreationally Active Individuals. Nutrients, 13, 764. doi: 10.3390/nu13030764.
Gutiérrez-Hellín, J., Ruiz-Moreno, C., Aguilar-Navarro, M., Muñoz, A., Varillas-Delgado, D., Amaro-Gahete, F.J., Roberts, J.D., Del Coso, J. (2021). Placebo Effect of Caffeine on Substrate Oxidation during Exercise. Nutrients, 13, 782. doi: 10.3390/nu13030782.
Tiller, N.B., Elliott-Sale, K.J., Knechtle, B., Wilson, P.B., Roberts, J.D., Millet, G.Y. (2021). Do Sex Differences in Physiology Confer a Female Advantage in Ultra-Endurance Sport?. Sports Medicine doi: 10.1007/s40279-020-01417-2.
Pinto, J. M., Merzbach, V., Willmott, A.G.B., Antonio, J. and Roberts, J. (2020). Assessing the impact of a mushroom-derived food ingredient on vitamin D levels in healthy volunteers. Journal of the International Society of Sports Nutrition, 17, 54. doi:10.1186/s12970-020-00387-0
Chapman, S., Rawcliffe, A. J., Smith, L., Izard, R., and Roberts, J. (2020). Evaluation of the current methods used for assessing dietary intake in military research settings: a scoping review. BMJ Military Health. Published Online First: 27 August 2020. doi: 10.1136/bmjmilitary-2020-001436
Chapman, S., Rawcliffe, A. J., Izard, R., Jacka, K., Tyson, H., Smith, L., Roberts, J. (2020). Dietary Intake and Nitrogen Balance in British Army Infantry Recruits Undergoing Basic Training. Nutrients, 12 (7), 2125. doi: 10.3390/nu12072125
Antonio, J., Candow, D. G., Forbes, S. C., Ormsbee, M. J., Saracino, P. G., Roberts, J. (2020). Effects of Dietary Protein on Body Composition in Exercising Individuals. Nutrients, 12 (6), 1890. 10.3390/nu12061890
Roberts, J., Liu, Q., Cao, C., Jackson, S. E., Zong, X., Meyer, G. A., Yang, L., Cade, W. T., Zheng, X., López-Sánchez, G. F., Wu, X. and Smith, L. (2020). Association of Hot Tea Consumption with Regional Adiposity Measured by Dual-Energy X-Ray Absorptiometry in NHANES 2003-2006. Obesity, 28: 445-451. doi:10.1002/oby.22705
Chapman, S., Roberts, J., Smith, L., Rawcliffe, A., Izard, R. (2019). Sex differences in dietary intake in British Army recruits undergoing phase one training. Journal of the International Society of Sports Nutrition, 16:59. doi:10.1186/s12970-019-0327-2
Tiller, N. B., Roberts, J. D., Beasley, L., Chapman, S., Pinto, J. M., Smith, L., Wiffin, M., Russell, M., Sparks, S. A., Duckworth, L., O’Hara, J., Sutton, L., Antonio, J., Willoughby, D. S., Tarpey, M. D., Smith-Ryan, A. E., Ormsbee, M. J., Astorino, T. A., Kreider, R. B., McGinnis, G. R., Stout, J. R., Smith, J. E. W., Arent, S. M., Campbell, B. I. and Bannock, L. (2019). International Society of Sports Nutrition Position Stand: nutritional considerations for single-stage ultra-marathon training and racing. Journal of the International Society of Sports Nutrition 16:50 doi: 10.1186/s12970-019-0312-9
Antonio, J., Kenyon, M., Horn, C., Jiannine, L., Carson, C., Ellerbroek, A., Roberts, J., Peacock, C. and Tartar, J. (2019). The Effects of an Energy Drink on Psychomotor Vigilance in Trained Individuals. Journal of Functional Morphology and Kinesiology, 4, 47; doi:10.3390/jfmk4030047
Antonio, J., Knafo, S., Kenyon, M., Ali, A., Carson, C., Ellerbroek, A., Weaver, C., Roberts, J., Peacock, C. and Tartar, J. (2019). Assessment of the FTO gene polymorphisms (rs1421085, rs17817449 and rs9939609) in exercise-trained men and women: the effects of a 4-week hypocaloric diet. Journal of the International Society of Sports Nutrition. 16:36. doi: 10.1186/s12970-019-0307-6
Antonio, J., Kenyon, M., Ellerbroek, A., Carson, C., Burgess, V., Tyler-Palmer, D., Mike, J., Roberts, J., Angeli, G., Peacock, C. (2019). Comparison of Dual-Energy X-Ray Absorptiometry (DXA) versus a Multi-frequency Bioelectrical Impedance (InBody 770) Device for Body Composition Assessment after a 4-Week Hypoenergetic Diet. Journal of Functional Morphology and Kinesiology, 4, 23; doi: 10.3390/jfmk4020023
Tiller, N. B., Chiesa, S. T., Roberts, J. D., Turner, L. A., Jones, S., Romer, L. M. (2019). Physiological and Pathophysiological Consequences of a 25-Day Ultra-Endurance Exercise Challenge. Frontiers in Physiology, 10:589. doi: 10.3389/fphys.2019.00589
Johnson, D.M., Roberts, J.D., Gordon, D. (2019). The acute effects of whole blood donation on cardiorespiratory and haematological factors in exercise: A systematic review. PLOS ONE, 14(4):e0215346. doi: 10.1371/journal.pone.0215346
Roberts, J., Zinchenko, A., Mahbubani, K., Johnstone, J., Smith, L., Merzbach, V., Blacutt, M., Banderas, O., Villasenor, L., Vårvik, F., Henselmans, M. (2019). Satiating Effect of High Protein Diets on Resistance-Trained Individuals in Energy Deficit. Nutrients, 11, 56; doi: 10.3390/nu11010056
Wiffin, M., Smith, L., Antonio, J., Johnstone, J., Beasley, L., Roberts, J. (2019). Effect of a short-term low fermentable oligosaccharide, disaccharide, monosaccharide and polyol (FODMAP) diet on exercise-related gastrointestinal symptoms. Journal of the International Society of Sports Nutrition, 16:1. doi: 10.1186/s12970-019-0268-9
Beasley, L., Smith, L., Antonio, J., Gordon, D., Johnstone, J., Roberts, J. The effect of two β-alanine dosing strategies on 30-minute rowing performance: a randomized, controlled trial. (2018). Journal of the International Society of Sports Nutrition, 15:59. doi: 10.1186/s12970-018-0266-3
Roberts, J., Zinchenko, A., Suckling, C., Smith, L., Johnstone, J., Henselmans, M. (2017). The short-term effect of high versus moderate protein intake on recovery after strength training in resistance-trained individuals. J. Int. Soc. Sports Nutr., 14:44. doi: 10.1186/s12970-017-0201-z
Marshall, H., Chrismas, B., Suckling, C., Roberts, J., Foster, J. and Taylor, L. (2017). Chronic probiotic supplementation with or without glutamine does not influence the eHsp72 response to a multi-day ultra-endurance exercise event. Appl. Physiol., Nutr. Metab., 5: 1-8. doi: 10.1139/apnm-2017-0131
Furber, M., Anton-Solanas, A., Koppe, E., Ashby, C., Roberts, M. and Roberts, J. (2017). A 7-day high protein hypocaloric diet promotes cellular metabolic adaptations and attenuates lean mass loss in healthy males. Clin. Nutr. Exper., 14: 13-25. doi: 10.1016/j.yclnex.2017.05.002
Furber, M., Roberts, J. and Roberts, M. (2017). A Psychometrically Validated General and Sport Nutrition Knowledge Questionnaire. BMC Nutrition, 3: 36. doi: 10.1186/s40795-017-0156-0
Roberts, J. D., Suckling, C. A., Peedle, G. Y., Murphy, J. A., Dawkins, T. G. and Roberts, M. G. (2016). An Exploratory Investigation of Endotoxin Levels in Novice Long Distance Triathletes, and the Effects of a Multi-Strain Probiotic/Prebiotic, Antioxidant Intervention. Nutrients, 8(11), 733. doi: 10.3390/nu8110733
Sridharan, S., Vilar, E., Davenport, A., Ashman, N. Almond, M., Banerjee, A., Roberts, J., Farrington, K. (2016) Scaling Hemodialysis Target Dose to Reflect Body Surface Area, Metabolic Activity, and Protein Catabolic Rate: A Prospective, Cross-sectional. Am. J. Kidney Dis., 69(3):358-366. doi: 10.1053/j.ajkd.2016.07.025
Roberts, J. D., Roberts, M. G., Tarpey, M. D., Weekes, J. C., and Thomas, C. H. (2015) The Effect of a Decaffeinated Green Tea Extract Formula on Fat Oxidation, Body Composition and Exercise Performance. J. Int. Soc. Sports Nutr., 12 (1): 1-9. doi: 10.3390/nu8110733
Paulin, S. W., Roberts, J. D., Roberts, M. G. and Davis, I. (2015). A Case Study Evaluation of Competitors undertaking an Antarctic Ultra Endurance Event - Nutrition, Hydration and Body Composition Variables. Extreme Physiol. Med., 4 (3): 1-11. doi: 10.1186/s13728-015-0022-0
Roberts, J. D., Tarpey, M. D., Kass, L. S., Tarpey, R. J. and Roberts, M. G. (2014). Assessing a commercially available sports drink on exogenous carbohydrate oxidation, fluid delivery and sustained exercise performance. J. Int. Soc. Sports Nutr., 11;8:1-14. doi: 10.1186/1550-2783-11-8
Sridharan, S., Berdeprado, J., Vilar, E., Roberts, J., Farrington, K. (2014). A self-report comorbidity questionnaire for haemodialysis patients. BMC Nephrol, 15(1): 134. doi: 10.1186/1471-2369-15-134
Tarpey, M. D., Roberts, J. D., Kass, L. S. and Tarpey, R. J. (2013). The ingestion of maltodextrin, fructose and protein during exercise; influence on exogenous carbohydrate oxidation and performance. Appl. Physiol., Nutr. Metab.; 9: 1-9. doi: 10.1139/apnm-2012-0306
Roberts, J. D., Tarpey, M. D., Kass, L. S. and Roberts, M. G. (2012). An investigative study into the influence of a commercially available carbohydrate-protein-electrolyte beverage on short term repeated exercise performance. J. Int. Soc. Sports Nutr., 9 (5): 1-11. doi: 10.1186/1550-2783-9-5
Presentations, Webinars & Invited Talks
2022 – Advance Performance (Invited Public Talk): ‘Fuelling your marathon”
2021 – Centre for Integrated Sports Nutrition (CISN - Invited Webinar): ‘Exercise and the Gut – Nutritional Approaches’
2021- Centre for Nutrition Education and Lifestyle Management (CNELM - Invited lectures): “ Exercise and the Use of Sports Drinks”, “Exercise and the Gut”, “Nutrition and Injury Management”.
2020 – Cambridge University Athletics (Invited talk): “Applying Sports Nutrition”.
2018: International Society of Sports Nutrition (ISSN) Conference – Keynote: ‘Ketogenic Diets and Body Composition’.
2018: Energy Metabolism Conference (Biocare Ltd) – Keynote: ‘Nutrition approaches to support adaptations to stress’.
2017: Invited public UK webinar (Biocare Ltd.) – ‘Is the gut built for exercise’
2016: Sports Nutrition Live Conference, London – Keynote: ‘Nutritional Physiology and the Gut’
2017/2016: Anglia Ruskin University, Cambridge Half Marathon Event Preparation – ‘Race Nutrition’
2015: Invited lecture (Cambridge University) – ‘Nutrition for Rowing Performance’.
2015: Invited public UK webinar (Biocare Ltd.) – ‘High fat v high carbs - which diet is best for athletes?’
2015: London Marathon Medical Conference – Invited presentation: ‘Enhancing Marathon Performance Through Nutrition’
Selected Conference Proceedings
Dawkins, T.G., Shave, R.E., Baggish, A.L., Drane, A.L., Roberts, M.G. and Roberts, J.D., (2018). Electrocardiographic Changes Following Six-Months Of Endurance Training In Previously Training-Naïve Individuals. Accepted for presentation to The 3rd Okanagan Cardiovascular & Respiratory Symposium, Okanagan, British Columbia, March 2018.
Roberts, J., Zinchenko, A., Suckling, C., Smith, L., Johnstone, J., Henselmans, M. (2017). Assessing the impact of dietary protein on recovery indices from resistance exercise when nutrient timing is controlled for. BASES Annual Conference Proceedings, Nottingham, November 2017.
Taylor, L., Suckling, C., Roberts, J., Chrismas, B. and Marshall, H. (2016). Chronic probiotic supplementation and its effects on ehsp72 concentration following a desert-based ultramarathon. The Biomedical Basis of Elite Performance (London, UK) – Proceedings of the Physiological Society; 35: PC30.
Roberts, J., Suckling, C., Peedle, G., Gordon, D., Marshall, H., Taylor, L. and Roberts, M. (2016). Assessing the Impact of Probiotic Supplementation and Caloric Periodization on Ultra-endurance Performance and Gastrointestinal Symptoms. Med Sci Sports Exerc. 2016 May;48(5 Suppl 1):245.
Suckling, C., Roberts, J., Peedle, G., Gordon, D., Marshall, H., Taylor, L. and Roberts, M. (2016). Probiotic Supplementation and Gastrointestinal Endotoxemia Before and After the Marathon Des Sables. Med Sci Sports Exerc. 2016 May;48(5 Suppl 1):249-50.
Furber, M., Anton-Solanas, A., Koppe, E., Ashby, C., Roberts, M. and Roberts, J. (2016). An Acute Increase of Dietary Protein Intake Elicits Positive Cellular Metabolic Adaptations in Healthy Males. Med Sci Sports Exerc. 2016 May;48(5 Suppl 1):821.
Taylor, L., Suckling, C., Roberts, J., Chrismas, B. and Marshall, H. (2016). The extracellular heat shock protein response to a 7-day desert-based ultra-marathon. Med Sci Sports Exerc. 2016 May;48(5 Suppl 1):563-4.
Marshall, H., Suckling, C., Roberts, J., Chrismas, B., Taylor, L (2016) Chronic Probiotic Supplementation and its Effects on eHsp72 Concentration Following a Desert-based Ultramarathon. European Congress of Sport Sciences (ECSS) – Annual Meeting, Vienna, Austria.
Chapman, S., Gordon, D., Roberts, J. The effect of sex on fat metabolism during exercise. Proceedings of The British Association for Sport and Exercise Science Student Conference, 22nd –24th March 2016, University of Bangor.
Sridharan, S., Vilar, E., Davenport, A., Ashman N., Almond M., Banerjee A., Roberts, J., Farrington K. (2015). Body Size And Physical Activity Adjusted Haemodialysis Dose: Impact On Survival. British Renal Society Conference, Leeds, UK. July 2015.
Sridharan, S., Smith, K., Vilar, E., Roberts, J., Farington, K. (2015). Energetic Cost of Protein Turnover in Chronic Kidney Disease. Nephrology Dialysis Transplantation, Volume 30, Issue suppl_3, 1 May 2015, Pages iii515, https://doi.org/10.1093/ndt/gfv193.20.
Roberts, J.D., Suckling, C.A., Peedle, G.Y., Murphy, J.A., Dawkins, T.G. and Roberts, M.G. (2015). Combined Probiotic and α-Lipoic Acid Supplementation Effect on Endotoxemia, Gastrointestinal Permeability and Triathlon Performance. Med Sci Sports Exerc. . 47(5S):341, May 2015.
Dawkins, T.G., Roberts, M.G., Suckling, C.A., Peedle, G.Y., Murphy, J.A. and Roberts, J.D. (2015). The Short and Longer Term Impact of an Iron-Distance Triathlon on Arterial Stiffness. Med Sci Sports Exerc. 47(5S):53-54, May 2015.
Suckling, C.A., Roberts, J.D., Peedle, G.Y., Murphy, J.A., Dawkins, T.G. and Roberts, M.G. (2015). Vitamin D Intake and Status in a Recreationally Trained Cohort Undertaking an Iron-distance Triathlon. Med Sci Sports Exerc. 47(5S):781, May 2015.
Roberts, M.G., Dawkins, T.G., Murphy, J.A., Peedle, G.Y., Suckling, C.A. and Roberts, J.D. (2015) Assessing the Ergogenic Potential of α-Lipoic Acid on Laboratory Time Trial and Iron-distance Triathlon Performance. Med Sci Sports Exerc. 47(5S):341-342, May 2015.
Marshall, T.D., Pack, S., Roberts, J.D., Roberts, M.G. and Suckling, C.A. (2015).The Influence of Mental Toughness on Performance in Novice Ironman Triathletes. Medicine & Science in Sports & Exercise. 47(5S):29, May 2015.