仰泳也可叫成背泳，仰卧于水面的游泳姿势，是最放松的泳姿。仰泳的动作要领有“反爬泳”和“反蛙泳”，“反爬泳”因为速度快，几乎无一例外被运动员在比赛中使用。学习仰泳的动作要领时，口鼻一直处于水面上，呼吸便利，但是无法前望，方向感难于掌握。在游泳比赛中，唯仰泳须要运动员在水里出发，其它泳式都可以跳水起步。因此，在个人混合泳比赛中仰泳是第二种泳姿，而在接力混合泳比赛中是第一种泳姿。
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