a Laboratory of Analysis of Sport Performance, Sport and Physical Education Department, Faculty of Sport Sciences , University of the Basque Country, Vitoria-Gasteiz , Spain. b Regional Unit of Sport Medicine-Avilés City-Council Foundation, Functional Biology Department , University of Oviedo , Asturias , Spain. c ImFINE Research Group, Department of Health and Human Performance, Faculty of Physical Activity and Sport Sciences (INEF) , Technical University of Madrid , Madrid , Spain. d Facultad de Ciencias de la Salud , Universidad Isabel I , www.ui1.es , España. e Department of Sport and Health Sciences , Oxford Brookes University , Oxford , UK. f Faculty of Kinesiology , University of Zagreb , Zagreb , Croatia. g Sport and Physical Education Department, Faculty of Sport Sciences , University of Leon , León , Spain. h Complex Systems in Sports Research Group, National Institute of Physical Education of Catalonia (INEFC), University of Lleida , Lleida , Spain. i Exercise Physiology Laboratory , Center for Health, Exercise and Sport Sciences , Belgrade , Serbia.