Effects of weight lifting training combined with plyometric exercises on physical fitness, body composition, and knee extension velocity during kicking in football - Perez-Gomez, J.; Olmedillas, H.; Delgado-Guerra, S.; Ara Royo, I.; Vicente-Rodriguez, G.; Arteaga Ortiz, R.; Chavarren, J.; Calbet, J. A. L. (Applied Physiology, Nutrition, and Metabolism, 2008)