School of Psychology and Exercise Science, Murdoch University, Murdoch, Western Australia, Australia; Faculty of Kinesiology, University of New Brunswick, Fredericton, Canada. Electronic address: J.Hebert@Murdoch.edu.au. Centre of Research in Childhood Health, Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark. Centre of Research in Childhood Health, Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway, and the Faculty of Teacher Education and Sports, Sogn og Fjordane University College, Sogndal, Norway. School of Psychology and Exercise Science, Murdoch University, Murdoch, Western Australia, Australia; Centre of Research in Childhood Health, Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Sports Medicine Clinic, the Orthopedic Department, Hospital of Middelfart, Institute of Regional Health Services Research, University of Southern Denmark, Middelfart, Denmark.