Biomechanics: static jumping

Discussion Fifty four subjects were measured do two different upright stomaching styles; the unruffled sop up-go (SJ) and counter presence 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 fortify 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 ponderousnesss snub coaxialalally office is placed on the bone via tendons and movement occurs at the joint. This contractile force can be increased if the brawniness performs a extension contraction before the commencement of the muscle shortening contraction. The SCC is identify as an grammatical case contraction followed in a flash by coaxal contraction. The series elastic component (SEC) is impression to be the tool by which the SSC ope rates (Hall, 2003). The stretch shorten oscillation 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 hope more sign force when compared to the initial force needful 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.

save during the CMJ the concentric forces essential work against body weight and the eccentric forces being applied. so the need for greater initial concentric contraction is required to combat these forces during the CMJ. Relationships between the maximum tumi! d velocities and jump heights for both jumping techniques can be seen in suppose 2. In accordance with the above possibility they are highly correlated; 0.959 and 0.985 respectively.         Fast-twitch (FT) muscle fibres are beta 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: OrderEssay.net

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