做的時候手臂緊貼二耳，下腰和起來時屁股不能離開腳後跟，背不能彎曲，用core 的力量下去。試試！

來源: lawattaction 於 2017-10-14 16:20:18 [舊帖] [給我悄悄話] 本文已被閱讀：次

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