NCAA backstroke medalist Connor Oslin demonstrates stable head in backstroke. From above water, notice that there's no side-to-side movement of the head. From under water, notice that there's no up-and-down movement of the head. He moves his head in one, direct line down the pool.
[复制链接]
IP卡
狗仔卡
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
千斤顶
显身卡
