[1
] School of Health Sciences, Liverpool Hope University, Liverpool, UK
[2
] Human and Health Sciences, University of Huddersfield, Huddersfield, UK
[3
] Institute for Sport, Physical Activity and Leisure, Leeds Beckett University, Leeds,
UK
[4
] The Rugby Football League, Leeds, UK
[5
] Yorkshire Carnegie Rugby Union Club, Leeds, UK
[6
] Leeds Rhinos Rugby League Club, Leeds, UK
[7
] Mary Immaculate College, Limerick, Ireland
[8
] CB Sports Performance Ltd, Rugeley, UK
[9
] Sport, Health and Exercise Science, University of Hull, Hull, UK