Effects of a contrast training program without external load on vertical jump, kicking speed, sprint, and agility of young soccer players - Garcia-Pinillos, F.; Martinez-Amat, A.; Hita-Contreras, F.; Martinez-López, E. J.; Latorre-Román, P. A. (The Journal of Strength and Conditioning Research, 2014)
Keywords: soccer; junior elite sport; training; load organization; relation; jump; strength; velocity; speed; flexibility; USA; sport games; junior sports