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). <…showed first 75 words of 980 total…

…showed last 75 words of 980 total…for strength and conditioning. Journal of strength and conditioning research 2004 Nov; Vol. 18 Issue 4, pp. 787-91 Challis, JH. Examination of the scaling of human jumping. Journal of strength and conditioning research. 2004 Nov; Vol. 18 Issue 4, pp. 803-9. Hall, S. (2003). Basic Biomechanics 4th Edition McGraw-Hill pp. 153, 163 Bobbert MF, Gerritsen KGM, Litjens MCA, Soest AJ, (1996) Explanation of differences in jump height between countermovement and squat jumps. XV Congress of the International society of Biomechanics, Gummerus printing, Finland pp.110-111