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一、小肌肉群在运动时的作用在运动中,人体的所有动作都是依靠肌肉收缩产生的内力并配合一定的外力作用而完成的。毫无疑问,像腰、背、腹、大腿等部位的那些位于身体重心附近的大肌群的收缩用力是人体运动时内力的主要来源。但是在肢体远端的一些小肌肉群,对完成动作也起着不可忽视的作用,概括为以下三个方面: 1.小肌群在大肌群发力之后的顺势收缩用力,可以延长人体内力对地面或器械的作用距离;加大人体远端的运动速度,即位移的加快(在跑、跳、游泳等项口中),或是器械出手的初速度加快(如投出标枪、棒垒球以及手球和水球的射门等)。这对提高运动成绩都具有十分重要的意义。
First, the role of small muscle groups in exercise In the exercise, all the actions of the human body are to rely on internal forces generated by muscle contraction and with a certain degree of external force to complete. There is no doubt that such as the waist, back, abdomen, thighs and other parts of those who are located in the vicinity of the center of gravity of the muscle contraction of the human body is the main source of internal force. However, some small muscle groups distal to the body also play an important role in the completion of the action, which can be summarized as the following three aspects: 1. The small muscle group can exert the homeopathic force after the great muscle group exerts its force to prolong the internal force of the human body Ground or instrument distance; increase the speed of the body’s distal movement, that is, to speed up the displacement (in the run, jump, swimming and other items), or the initial release speed of equipment shots (such as throwing javelin, baseball softball and handball And water polo shots, etc.). This is of great significance to improving athletic performance.