动过则损，关节是有寿命的，长跑二十年膝关节的软骨就快磨损完了吧。

来源: 贪农大狼于 2017-11-12 20:12:20 [旧帖] [给我悄悄话] 本文已被阅读：次

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动过则损，关节是有寿命的， 长跑二十年膝关节的软骨就快磨损完了吧。