1. Movement Physiology Research Laboratory, University of the Witwatersrand, Johannesburg, South Africa
2. Arthroplasty Unit, Division of Orthopaedic Surgery, Charlotte Maxeke Johannesburg Academic Hospital, Johannesburg, South Africa
3. Sleep, Cognition and Neuroimaging Laboratory, Department of Health, Kinesiology and Applied Physiology, Faculty of Arts and Sciences, Concordia University, Montreal, Quebec, Canada
4. Department of Exercise Sciences, The University of Auckland, New Zealand