1. Department of Sport, Recreation and Exercise Science, University of the Western Cape, Cape Town, South Africa
2. School of Public Health, University of the Western Cape, Cape Town, South Africa
3. Institute of Sport Science, University of Vienna, Vienna, Austria
4. Department of Psychology, University of the Western Cape, Cape Town, South Africa
5. Goethe-Universität Frankfurt am Main, Fachbereich 05 Psychologie und Sportwissenschaften, Institut für Sportwissenschaften, Abteilung für Sportpsychologie, Germany
6. Division of Endocrinology and Diabetic Medicine, University of Cape Town, Cape Town, South Africa
7. Division of Exercise and Sports Medicine, Department of Human Biology, University of Cape Town, Cape Town, South Africa