. . . Published ahead of Print Effect of Muscle Length on Voluntary Activation Level in Children and Adults Virginie Kluka 1,2 , Vincent Martin 1 , Sebastian Garcia Vicencio 1 , Anne-Gaëlle Jegu 3 , Charlotte Cardenoux 3 , Cédric Morio 2 , Emmanuel Coudeyre 3,4,5 , and Sébastien Ratel 1 1 Clermont University, Blaise Pascal University, EA 3533, Laboratory of metabolic adaptations during exercise in physiological and pathological conditions (AME2P), BP 80026, Aubière, France; 2 Oxylane Research, Department of Movement Sciences, Villeneuve d’Ascq, France; 3 Clermont University Hospital, Clermont-Ferrand, France; 4 INRA, Human Nutrition Unit (UNH, UMR 1019), CRNH Auvergne, Clermont-Ferrand, France; 5 Clermont University, Auvergne University, Clermont-Ferrand, France Accepted for Publication: 27 July 2014 Medicine & Science in Sports & Exercise® Published ahead of Print contains articles in unedited manuscript form that have been peer reviewed and accepted for publication. This manuscript will undergo copyediting, page composition, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered that could affect the content. Copyright © 2014 American College of Sports Medicine ACCEPTED