British Journal of Sports Medicine (BJSM) is a multimedia information portal that provides original research, reviews and debate relating to clinically-relevant aspects of sport, and exercise medicine. We contribute to innovation (research), education (teaching and learning), and knowledge translation (implementing research into practice and policy). We use web, print, video, and audio material to serve the international sport and exercise medicine community. * The purpose of this podcast is to educate and to inform. The content of this podcast does not constitute medical advice and it is not intended to function as a substitute for a healthcare practitioner’s judgement, patient care or treatment. The views expressed by contributors are those of the speakers. BMJ does not endorse any views or recommendations discussed or expressed on this podcast. Listeners should also be aware that professionals in the field may have different opinions. By listening to this podcast, listeners agree not to use its content as the basis for their own medical treatment or for the medical treatment of others.