Myoelectrical properties of lower limbs, in soccer players compared to different fall height and use of additional weight in a Sledge machine. - STERGIOS, KOMSIS; THEOHARRIS, KOMSIS; IOANNIS, GISSIS; EVANGELOS, BEKRIS; NIKOLAOS, XANTHOPOULOS; CHRISTOS, PAPADOPOULOS (Journal of Physical Education & Sport, 2012)