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在中小学中长跑业余训练中,肌体常处于较大的负荷中,这就要求运动员的中枢神经系统必须具有很高的稳定性。通过中枢神经协调肌肉有节律而又不间断的放松收缩,对抗肌交互接受神经支配,使各运动机能单位轮流工作。根据国外生理学家对中长跑运动员训练课前后肌张力测定,在训练后,肌肉的紧张和放松能力都明显下降,表明这时肌肉已经非常疲劳。如果教师此时单纯追求运动成绩,还一味对学生进行较大负荷的训练,这样导致未恢复的皮质细胞又受到新的
In primary and secondary middle-aged run amateur training, the body often in a larger load, which requires the athlete’s central nervous system must have a high stability. Through the central nervous system coordination of muscle rhythmic and uninterrupted relaxation, antagonistic muscle interactively accept the innervation, so that motor function units take turns working. According to foreign physiologists on the long-distance runner training before and after the test of muscle tone, after training, muscle tension and relaxation ability decreased significantly, indicating that the muscle has been very tired at this time. If the teacher at this time pure pursuit of athletic performance, but also blindly students to exercise a greater load, thus leading to unrecovered cortical cells are subject to new