Martin Schwellnus is a full professor of Sport and Exercise Medicine at the Faculty of Health Sciences, University of Pretoria in South Africa. He is also a specialist sports and exercise medicine physician who regularly consults with athletes of all levels. He holds an MBBCh from University of the Witwatersrand (cum laude), a M.Sc. (Med) from University of Cape Town, and an M.D. (equivalent to a PhD) degree from University of Cape Town, and is a fellow of the American College of Sports Medicine. Among the many other responsibilities he holds, Prof Schwellnus is a Director of the newly established Sport, Exercise Medicine and Lifestyle Institute (SEMLI) at the University of Pretoria, has been the Director of the International Olympic Committee (IOC) Research Center in South Africa for the last 9 years, is a longstanding member of the IOC Medical Commission (Medical and Science group), and is a member of the editorial board of a number of international journals including the British Journal of Sports Medicine. He has an interest in a number of areas in sport and exercise medicine notably the health benefits of regular exercise and the prevention and management of injuries and medical complications in active individuals. He promotes the safe prescription of regular exercise to all populations in order to reduce the global burden of non-communicable disease. He is an active researcher and has published over 300 scientific journal articles, chapters in books and conference proceedings.