Dr Justin Carrard is a Senior Physician (médecine associé) in Sport and Exercise Medicine at the Lausanne University Hospital (CHUV), where he heads the Sport and Youth Health Unit within the Swiss Olympic Medical Centre. He also serves as a Consultant at the Sport & Exercise Medicine Centre (CHUV). He is a scientific collaborator at the Institute of Sport Sciences, University of Lausanne, and an Associate Researcher at the Department of Sport, Exercise, and Health, University of Basel, where he previously completed a postdoctoral fellowship. His research focuses on high-throughput metabolomics and lipidomics to investigate the metabolic determinants of training adaptation, overtraining syndrome, relative energy deficiency, fatigue, and healthy ageing. As a clinician, Dr Carrard adopts a holistic approach to care, addressing athletes’ and patients’ needs comprehensively. His practice encompasses injury diagnosis and treatment, musculoskeletal ultrasound, pre-participation assessments, fatigue management, performance testing, and exercise prescriptions. Passionate about sport and exercise medicine, he is committed to safeguarding athletes’ health, preventing and treating injuries, illnesses, and non-communicable diseases, and ultimately helping individuals age healthily and happily. A former competitive swimmer, he maintains a strong interest in endurance sports and continues to practise them passionately.