其实有哑铃就可以了哑铃便宜哑铃的方法接近实际生活
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送交者: HunHunSheng 于 2008-06-21, 21:39:15:
回答: 看看这个怎样? Powertec Workbench Multi System 由 湘女 于 2008-06-21, 21:26:20:
execeise machine isolate musslce better but it has disadvantage because it may cause imbalabce in
musslece strength. Lifitng dumbbells always require
coodination of differnet musslce
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