when you curl up, the center of weight is moved from

來源: borisg 於 2022-05-20 11:49:30 [] [博客] [舊帖] [給我悄悄話] 本文已被閱讀： 次 (203 bytes)

below the belly button to somewhere in the chest so it will keep the upper body close to the floor, while the curled legs swing up. You need some weight on the feets to keep them on the floor.

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• The supporting point make a difference too lol -喝高了- ♂ 給 喝高了 發送悄悄話 喝高了 的博客首頁 (201 bytes) () 05/20/2022 postreply 12:04:57

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