. . . Published ahead of Print Evidence of Parasympathetic Hyperactivity in Functionally Overreached Athletes Yann Le Meur 1 , Aurélien Pichon², Karine Schaal 1,3 , Laurent Schmitt 4 , Julien Louis 1 , Jacques Gueneron 5 , Pierre Paul Vidal 6 , and Christophe Hausswirth 1 1 National Institute of Sport, Expertise and Performance, Laboratory of Sport, Expertise and Performance, Paris, France; ²University Paris 13 North, Sorbonne Paris City, Laboratory of Functional and Cellular Responses to Hypoxia, Bobigny, France; 3 Sports Performance Laboratory, Sports Medicine Program, University of California, Davis, Sacramento, CA, United States; 4 French National Ski Center, Prémanon, France; 5 National Institute of Sport, Expertise and Performance, Medical Department, Paris, France; 6 CESeM, CNRS, University Paris Descartes, Paris, France Accepted for Publication: 19 April 2013 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 © 2013 American College of Sports Medicine ACCEPTED