Storyboard

The jump converts the mechanical energy generated during the propulsion (stance) phase into kinetic and potential energy of the CM during the flight phase. In vertical jump, the height reached depends only on the vertical speed of the CM at takeoff (h = v²/2g). The stretch-shortening cycle (CEA) preceded by a countermovement (CMJ) can increase the jump height by 1020% compared to the static jump, due to a greater contribution of the elastic energy of tendons and muscles and reflex potentiation. Net impulse (area under the GRF curve minus body weight) is equal to the momentum change of the CM at takeoff. In long jump, the optimal take-off angle (~2025° for an athlete with high CM) maximizes reach. Landing involves energy absorption by the knee and ankle extensors (eccentric work).

>Model

ID:('ky', 456)

Description

ID:(0, 456)