Physiological status and prediction of cardiovascular fitness in highly trained youth soccer athletes - Williford, H. N.; Scharff-Olson, M.; Pugh, S.; Duey, W. J.; Barksdale, J. M. (The Journal of Strength and Conditioning Research, 1999)
Keywords: soccer; heart; circulation; lactate; junior elite sport; sport physiology; test; USA; biological and medical sciences; junior sports; sport games