A short coach's clip of video showing how stable Ash's head is when he swims backstroke.
Look at how dynamically the body rotates around the centerline, the movement of the shoulders, the catch of the hands... nothing disturbs the solid position of the head.
In this great view, you can also see how Ashley times his breathing. Backstroke breathing also has a rhythm like the other strokes.
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提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
千斤顶
显身卡
