仰卧起坐是发展躯干肌肉力量和伸展性的一种练习方法 ,属于周期性动作。通常以一分种内所完成动作的次数来测定学生的这一身体指标。仰卧起坐成绩的好坏取决于动作方法是否正确 ;呼吸方法是否合理。根据运动生理学分析 ,我们得出以下结论 :在做仰卧起坐时 ,身体前屈时应呼气 , Sit-ups are a practice method of developing the strength and extensibility of the trunk muscles and are cyclical movements. The physical indicator of a student is usually determined by the number of actions performed within a minute. The quality of sit-ups depends on whether the correct method of action; breathing method is reasonable. According to exercise physiology analysis, we conclude that when doing sit-ups, the body should be exhaled exhale,