1. a Human Physiology Research Group, School of Health, Staffordshire University, Leek Road, Stoke-on-Trent ST4 2DF, UK, and Optimal Performance Ltd, Old Chambers, 93-94 West Street, Farnham GU9 7EB, UK
2. b Human Physiology Research Group, School of Health, Staffordshire University, Leek Road, Stoke-on-Trent ST4 2DF, UK, and School of Sport and Exercise Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
3. c School of Sport and Exercise Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK