Is this the machine you push your feet on a board?

来源: by心言 于 2015-12-28 09:59:51 [] [博客] [旧帖] [给我悄悄话] 本文已被阅读： 0 次 (158 bytes)

Be careful with your knee joints. Usually it helps improve you leg strength to do repeatedly, but too much weight may do some harm in the long run.

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• Yes， thanks for reminding. -二泉映月09- ♂ 给 二泉映月09 发送悄悄话 二泉映月09 的博客首页 (0 bytes) () 12/28/2015 postreply 10:01:29

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