Kevin Till, PhD, is a Professor of Athletic Development in the Carnegie School of Sport at Leeds Beckett University, UK. Jonathon Weakley, PhD, is a Lecturer of Strength and Conditioning and Human Physiology at Australian Catholic University, Australia. He is also an Associate Research Fellow at Leeds Beckett University, UK. Sarah Whitehead, PhD, is a Senior Lecturer in Strength and Conditioning within the Carnegie School of Sport at Leeds Beckett University, UK. Ben Jones, PhD, is a Professor of Sport and Exercise Physiology within the Carnegie School of Sport at Leeds Beckett University, UK. He is also a Visiting Professor at the University of Cape Town, South Africa, and the University of New England, Australia.