送交者: HunHunSheng 于 2005-10-28, 10:14:05:
回答: 骑车比跑步好,不容易受伤。不过骑车基本用不上小腿。 由 Enlighten 于 2005-10-28, 10:12:14:
If you are to raise your HR to the target zone, you need to cycle very fast, but the safety concernwon't allow it.
加跟贴
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