1. Department of Sport Management, Faculty of Business, Cape Peninsula University of Technology, Highbury Road, Mowbray 7700, South Africa; and MRC/UCT Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Science, University of Cape Town, Sports Science Institute of South Africa, Boundary Road, Newlands 7700, South Africa
2. MRC/UCT Medical Imaging Research Unit, Department of Human Biology, Faculty of Health Science, University of Cape Town, Observatory 7925, South Africa