如果你25到45歲，身體狀況良好，哪天勻速跑個4公裏，時間在20分鍾左右，就知道慢跑是不是劇烈運動

來源: 短刀於 2013-04-28 15:56:57 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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