原地起跳即垂直向上的起跳,又称原地纵跳,对它的研究具有普遍的、基础性的意义。 起跳能力取决于内力和外力的相互作用。人体起跳是在各器系协调配合下进行的,其中下肢起主要作用。一般认为由下蹲到下蹲起,力作用到地面,地面反作用力推动人体以一定速度腾起,并达到一定的腾空高度。 关于下肢形态、下肢肌的机能,在经典教科书上均有记载①—③。研究蹲跳时腿部肌肉的机能,提出膝关节运动幅度愈小, Take-off in situ is the vertical jump, also known as vertical jump, its research has universal, basic meaning. The ability to take off depends on the interaction of internal and external forces. Human take-off is carried out in coordination with the various departments, including the lower limbs play a major role. Generally believed that squat from squat down, the force acting on the ground, the ground reaction force to promote the human body to a certain speed, and reached a certain level of vacancy. On the lower limb shape, lower limb muscle function, are recorded in the classic textbook ①-③. Studying the function of leg muscle during squat jump, the smaller the range of motion of knee joint,