騎自行車上下班！單程12-13公裏，1小時。我早晚各騎一小時，6 周，腰腹的變化十分明顯。

來源: lawattaction 於 2016-01-14 17:38:50 [舊帖] [給我悄悄話] 本文已被閱讀：次

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