我準備跳一個月試試看,我現在每天跳兩次,每次15分鍾。跳的時候覺得頭有點震,這兩天好像適應點了。
回答: I jump for about 20 minutes, no 頸椎問題. Do you do some other exerc
由 kathyzh
於 2015-07-25 07:14:03
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