Biomechanics: static jumping

Discussion Fifty four subjects were measured do devil different upright stomaching styles; the motionless substantiate-go (SJ) and counter dejection jump (CMJ). The counter movement jump involved pre-stretching whereas the static jump needful a 3 second 90º worm at the knee joint. During both these jumps both harness were held nonmoving behind the subjects back. This is essential because arm swing enhances kinetic push button and consequently increases jump height (Lees, Clercq and Vanrenterghem, 2004).         When bodybuilders shrivel up coaxialalally office is placed on the bone via tendons and movement occurs at the joint. This contractile force can be increased if the massiveness performs a extension contraction before the commencement of the muscle shortening contraction. The SCC is identify as an showcase contraction followed at one time by coaxal contraction. The series elastic component (SEC) is purview to be the tool by which the SS C operates (Hall, 2003). The stretch shorten regular recurrence is likely to composition for the 11% difference between the SJ and CMJ means.         When performing the CMJ the concentric forces acting on the hip, knee and ankle joints had to put one over more sign force when compared to the initial force involve for the SJ, (Bobbert, Gerritsen, Litjens, Soest, 1996, cited in Walshe, Wilson, Ettema, 1998). During the SJ the concentric forces only work against body weight.

and during the CMJ the concentric forces essential work against body weight and the eccentric forces being applied. so the need for greater initial concentric contract! ion is required to combat these forces during the CMJ. Relationships between the maximum perpendicular velocities and jump heights for both jumping techniques can be seen in suppose 2. In accordance with the above opening they are highly correlated; 0.959 and 0.985 respectively.         Fast-twitch (FT) muscle fibres are strategic for athletes who must bring to pass powerful jumps (Hall, 2003). Individuals with a... If you want to get a full essay, regulate it on our website: OrderCustomPaper.com

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