1 Faculty of Sport Sciences Human Performance and Sports Science Laboratory University of Murcia Murcia, Spain.
2 Navarrabiomed, Complejo Hospitalario de Navarra (CHN)-Universidad Pública de Navarra (UPNA), IdiSNA, Pamplona, Spain; CIBER of Frailty and Healthy Aging (CIBERFES) Instituto de Salud Carlos III Madrid, Spain. Electronic address: mikel.izquierdo@gmail.com.