蛙泳比赛规则在不时发生变化。1986年,蛙泳比赛规则的重大变化是每一动作周期头要出水一次,允许头埋在水下前游。这项规定加大了身体前游时的上下起伏动作,为加快游速创造了前提。4种泳式中,蛙泳游速最慢。蛙泳游速主要取决于运动员爆发力水平,身体重量和身体游进时的形状。由于后一项因素是变动的,所以人们对合理蛙泳技术的看法也是变动的。事实上,不同风格的蛙泳技术在不同 Breaststroke rules vary from time to time. In 1986, a major change in the rules of breaststroke competition was to discharge water once per cycle, allowing the head to bury underwater. This provision increases the ups and downs before and after the body movements, to accelerate the speed to create the premise. Among the 4 swimmers, breaststroke was the slowest. Breaststroke swim speed mainly depends on the level of athlete’s explosive power, body weight and body shape when swimming. As the latter factor is changing, so does the perception of reasonable breaststroke techniques. In fact, different styles of breaststroke technology are different