Biomechanics: static jumping

Discussion Fifty four subjects were measured performing two different vertical jumping styles; the static jump (SJ) and counter movement jump (CMJ). The counter movement jump involved pre-stretching whereas the static jump required a 3 second 90º flex at the knee joint. During both these jumps both arms were held stationary behind the subjects back. This is essential because arm swing enhances kinetic energy and consequently increases jump height (Lees, Clercq and Vanrenterghem, 2004). <…

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