Study on the Kinematic Characteristics of Body Center of Gravity Changes During the Contact Phase with the Trampoline Bed of Chinese Trampolinists
The technical movements during the trampoline's contact phase serve as the foundation for athletes to per-form high-level airborne maneuvers.These movements play a crucial role in determining the height of takeoff,dis-placement control,and quality of aerial actions.The more reasonable the technical movements during the contact phase,the better the overall"netting"effect.In this study,we employed research methods such as literature re-view,expert interviews,and testing to deeply investigate the characteristics of changes in the height and velocity of the body's center of gravity during the contact phase,the changes in distance between the feet,the changes in an-gles of the shoulder,hip,knee,and ankle joints,as well as the depth of netting and changes in lower limb joint angles.The research findings revealed positive correlations between the reactive force of the trampoline surface and the athlete's netting depth,takeoff velocity,and jumping height,as well as between the height of netting and the initial velocity upon leaving the surface,and the force exerted during lower limb extension and netting height.How-ever,there was no correlation between the contact time and the jumping height,and there was no consistency in the changes in shoulder joint angles during the contact phase,while changes in the angles of the hip,knee,and ankle joints exhibited apparent symmetry.
trampolinecontact phasebed pressingbed bouncinganglespeedbody center
万方数据
维普
