Concentric and eccentric: muscle contraction or exercise? New perspective.

1 Sport Science, University e-Campus, Novedrate, Italy 2 Tunisian Research Laboratory “Sports Performance Optimization”, National Center of Medicine and Science in Sport, Tunis, Tunisia 3 Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar 4 Department of Medical Sciences, Sports Physiology Lab, University of Cagliari, Italy 5 Center of Sports, Federal University of Santa Catarina Florianópolis, Santa Caterina, Brazil 6 UR CIAMS – Motor Control and Perception Group, Sport Sciences Department, Bot, Universitè Paris, France 7 Department of Physical Education, São Paulo State University, Brazil 8 School of Exercise and Sport Science, Department of Neurological and Movement Sciences, University of Verona, Italy