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滚轮练腹肌是效果最好的。

f2f(风子)

 

(#11322342@0)
Last Updated: 2018-1-26
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为了练腹肌所以做 Crunch；结果腹肌没啥变化；脖子先痛到不行。这简直是要得颈椎病的意思。资深人士能不能给些建议？谢啦<3
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