[1] Univ Zaragoza, Univ Sch Hlth Sci, E-50009 Zaragoza, Spain
[2] Univ Zaragoza, Dept Pediat, E-50009 Zaragoza, Spain
[3] Univ Zaragoza, Fac Hlth & Sports Sci, Dept Physiotherapy & Nursing, Huesca, Spain
[4] Univ Politecn Madrid, Fac Ciencias Actividad Fis & Deporte, Madrid, Spain
[5] Univ Granada, Fac Med, Dept Fisiol, Granada, Spain