1. Division of Physiological Sciences, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
2. Health through Physical Activity, Lifestyle and Sport Research Centre (HPALS), Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
3. Western Province Rugby Academy, Cape Town, South Africa
4. Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK
5. Leeds Rhinos Rugby League Club, Leeds, UK
6. England Performance Unit, The Rugby Football League, Leeds, UK