做的时候手臂紧贴二耳，下腰和起来时屁股不能离开脚后跟，背不能弯曲，用core 的力量下去。试试！

来源: lawattaction 于 2017-10-14 16:20:18 [旧帖] [给我悄悄话] 本文已被阅读：次

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