1. Rangers Football Club, Physical Preparation and Performance, Rangers Training Centre, Glasgow, Scotland
2. Physiology, Exercise and Nutrition Research Group, University of Stirling, Stirling, Scotland
3. Institute for Social Science Research, University of Queensland, Queensland, Australia
4. Institute of Health and Wellbeing, University of Glasgow, Glasgow, Scotland
5. School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, England