Raphael Faiss1, Hans-Christer Holmberg, Grégoire P Millet. 1. Institute of Sport Sciences and Department of Physiology Faculty of Biology and Medicine University of Lausanne Lausanne, SWITZERLAND NVC, Swedish Winter Sports Research Centre Mid Sweden University Östersund, SWEDEN Institute of Sport Sciences and Department of Physiology Faculty of Biology and Medicine University of Lausanne Lausanne, SWITZERLAND.