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在原地双手头上掷实心球的测验中,经常发现部分同学虽然身体素质和身材都不差,但未能取得较理想的成绩;是由于他们在“掷球”时存在错误动作所致。因此,发现他们存在错误动作,并有针对性地进行纠正,是提高学生这项成绩的有效途径。现在我介绍几种常见的错误动作及纠正方法供同行参考。 一、实心球出手无力,或未完成掷球动作,实心球就提前离手。 产生原因: 1.两手没有用力握球,只是用手指轻托住实心球,造成手指与实心球之间的摩擦力减少;当掷球时,作用到实心球上的力量也就减少。 2.掷球时,不是向前上方挥臂,而是肘关节先向前下降,再掷球;造成手
In the test of throwing solid balls on the hands of both hands, it is often found that some of the students have not achieved satisfactory results even though their physical quality and size are not bad; they are caused by wrong actions when they throw balls. Therefore, finding that they have wrong actions and correcting them in a targeted manner is an effective way to improve students’ achievement. Now I introduce several common wrong actions and corrective methods for peer reference. First, the solid ball is weak, or has not completed the throwing action, and the solid ball will leave beforehand. Causes: 1. The two hands do not hold the ball hard, just use the fingers to gently support the solid ball, resulting in reduced friction between the finger and the solid ball; when the ball is thrown, the force acting on the solid ball is reduced. 2. When the ball is thrown, the arm is not swinging upwards, but the elbow first falls forward and then throws the ball;