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简直了！这组瘦后背也太酸爽了！！超虐~
超适合后背肉多手臂粗的姐妹 站着坐着居家办公都可以跟练 全程8分钟，练完后背热热的 核心收紧 肩部下沉 不要耸肩 每天循环三遍 练完记得拉伸放松 跟练：Yuuka Sagawa
瘦手臂后背！44/110
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