送交者: HunHunSheng 于 2006-6-11, 11:12:00:
回答: 如果“腿的上下扑腾主要是为了让腿不下沉”,那你的推进速度估计比蛙泳还要慢。 由 apple 于 2006-6-11, 08:26:41:
The leg movement
The leg movement in freestyle is called the flutter kick. The legs move alternately, with one leg kicking downward while the other leg moves upward. While the legs provide only a small part of the overall speed, they are important to stabilize the body position. In fact, the leg actually is used greatly, for it propels the swimmer through the water.
http://newsimg.bbc.co.uk/media/images/40779000/gif/_40779842_front_crawl_anim.gif