用正确的程序性知识指导练习以期达到提高单杠短振屈伸上技术教学效果的目的。
The correct procedural knowledge was used to instruct the practice in order to achieve the technical teaching effect goal of parallel bars.
单杠向后大回环脱手的原因主要是倒立后摆阶段抬头、挺胸、塌腰和悬垂前摆时翻腕等技术错误，以及思想和肌肉过度紧张等。
The reasons of hand leaving in horizontal bar giant swing backward such as technical error and muscle tension etc. Were analyzed.
单杠向后大回环脱手的原因主要是倒立后摆阶段抬头、挺胸、塌腰和悬垂前摆时翻腕等技术错误，以及思想和肌肉过度紧张等。
The reasons of hand leaving in horizontal bar giant swing backward such as technical error and muscle tension etc. Were analyzed.
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