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主动转肩带动胯的小幅翻转，更好的完成空中移臂
昨天去滑雪没有更新，今天接着讲！主动的转肩带动胯部的小幅转动，保证中轴线的中立与平直！转肩的目的是在于更好的完成提肘与空中移臂！每天进步一点，爱上游泳喽！
爱上游泳喽14/786
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