1. Division of Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, Cape Town, South Africa
2. Institute for Sport, Physical Activity and Leisure, Leeds Beckett University, Leeds, UK
3. Health, Physical Activity, Lifestyle and Sport Research Centre, University of Cape Town, Cape Town, South Africa
4. Amsterdam Collaboration on Health and Safety in Sports, Department of Public and Occupational Health and Amsterdam Public Health Research Institute, VU University Medical Center, Amsterdam, The Netherlands