Department of Biochemistry, Molecular Biology and Physiology, Faculty of Physical Therapy, University of Valladolid, 42004 Soria, Spain. juanfrancisco.mielgo@uva.es. Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA. mzourdos@fau.edu. Department of Physical Education and Sports, University of Basque Country (UPV-EHU), 1007 Vitoria, Spain. julio.calleja.gonzalez@gmail.com. Department of Biochemistry, Molecular Biology and Physiology, Faculty of Physical Therapy, University of Valladolid, 42004 Soria, Spain. a.cordova@bio.uva.es. Department of Cell Biology, Histology and Pharmacology, Faculty of Physical Therapy, University of Valladolid, 42004 Soria, Spain, diego.fernandez.lazaro@uva.es. diego.fernandez.lazaro@uva.es. Department of Anatomy, Faculty of Physical Therapy, University of Valladolid, 42004 Soria, Spain. director@iecscyl.com.