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目前,我国运动员的力量训练仍以举杠铃或重物为主要的基础训练器械。这些器械虽能为肌肉提供超负荷的训练条件,但缺点是都具有惯性所引起的冲击力——在每个练习动作过程中,随着这种冲击力的发展,肌肉所克服的阻力越来越小。所以,重力器械只能在动作刚开始时,对肌肉有较大强度的刺激,而在整个练习动作范围内,对肌肉的强刺激时间就较短。所谓“等动器械”是一个随外加阻力的大小自动调节装置。它能使肌肉在整个动作范围内都受到较大的阻力,使肌肉在每个动作中承受更大的负荷。
At present, the strength training of Chinese athletes is still taking the barbell or heavy as the main basic training equipment. Although these devices provide overloaded training conditions for the muscles, they all have the inertia of the impact - in each practice movement, with the development of this impact, the muscles overcome the more resistance The smaller. Therefore, the gravitational instrument can only have a greater intensity of the muscle stimulation at the beginning of the action, and the strong stimulation time of the muscle is shorter within the entire exercise range. The so-called “moving equipment” is a size with automatic resistance adjustment device. It allows the muscles in the entire range of motion are subjected to greater resistance, the muscles in each action to withstand a greater load.