摘要
游泳竞赛新规则允许仰泳运动员转身时手可不触壁。规则的这一改变使得仰泳运动员抛弃了过去采用的各种各样的转身方法。国际泳联对仰泳转身规定的新规则是:Upon completion of each length,somepart of the swimmer must touch the wall.Duringthe turn the shoulders may turn past thevertical toward the breast.If the swimmerturns past the vertical,such motion must
