Authors: Gordon O Matheson; Martin Klügl; Lars Engebretsen; Fredrik Bendiksen; Steven N Blair; Mats Börjesson; Richard Budgett; Wayne Derman; Uğur Erdener; John P A Ioannidis; Karim M Khan; Rodrigo Martinez; Willem van Mechelen; Margo Mountjoy; Robert E Sallis; Martin Schwellnus; Rebecca Shultz; Torbjørn Soligard; Kathrin Steffen; Carl Johan Sundberg; Richard Weiler; Arne Ljungqvist Journal: Sports Med Date: 2013-11 Impact factor: 11.136