Bio mechanic long jump
Biomechanical analysis of long jump ppt
Linthorne, N. The findings from Mendoza , Hay , and Linthorne found the optimum landing position is one with the hips fully flexed and the trunk well forward over the legs Figure Another important factor to consider when maximising energy conservation in the take-off phase is the surface material of the board and the shoes worn by the athlete. To counteract the energy lost during take-off, long jumpers use shoes specifically designed for their event that have spikes under the ball of the foot and stiff soles Linthorne, Activities in Physical Education and Sport. Landing We know the goal of long jump, more specifically, the landing, is to create the furthest distance between the take off line and the closest mark made in the sandpit by the athlete. Overall, the aspects of long jump can be linked quite effectively with triple jump. In only one or two studies was anything remotely approaching experimental or technological innovation in evidence. Other data-gathering procedures like three-dimensional cinematography, electromyography and accelerometry have rarely, if ever, been used. There are different flight techniques athletes are shown to generally adopt; there is the sail, hang, and hitch-kick, all shown in Figure 9.
The findings from MendozaHayand Linthorne found the optimum landing position is one with the hips fully flexed and the trunk well forward over the legs Figure Long jump however does have a preferred technique that is a combination of a number of factors such as posture, centre of gravity, ground contact time, and manipulating free-swinging limbs.
To calculate speed in scalar quantity the change in distance is divided by the change in time of the performance Blazevich, This means that as the athlete leans forwards, they push vertically downwards into the ground with a force large enough to overcome inertia, exerting an equal and opposite reaction ground reaction forceaccelerating the athlete forwards when combined with some horizontal force as well Figure 2 Blazevich, Continuing this, the last stride is shorter while maintaining the lowered centre of gravity.
Biomechanics of long jump pdf
Journal of sports sciences, 24 8 , Exerc Sport Sci Rev. Posted by. In this position the body can pivot over the leg to gain vertical velocity. The speed and angle of projection are determined by the combination of horizontal and vertical velocity. European Journal of Sport Science, 1 5 , The large touchdown distance has been explained as enabling an increase in the time period during which vertical impulse can be generated, increasing the range of movement through which the hip extensor muscles may work, and placing the leg in a position to enable it to be stretched and store elastic energy which recoils upon release. Given these facts, it is hard to avoid the conclusion that our knowledge of long jump techniques might be greatly improved if the full range of available and appropriate procedures were turned to the purpose.
Linthorne, N. This sequential movement pattern allows the conserved forward momentum from the previous three phases, to carry the body past the landing position for the longest possible jump. London and New York.
Two-dimensional cinematography has been used in the vast majority of the studies and force platforms in a few.
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