混合泳是用“蝶泳、仰泳、蛙泳、爬泳”四种泳式连续游完的项目 ,对运动员的游泳技术要求比较全面 ,因此 ,在游泳训练和比赛中属较难练、难题高的项目之一。儿童时期是一个很关键的时期。俗话说 :“种瓜得瓜 ,种豆得豆。”少年儿童的可塑性极强 ,他们的身体形态、生理机能、心 The medley is a continuous swimming tournaments with “butterfly stroke, backstroke, breaststroke and crawl stroke”. It requires a more comprehensive swimming technique for swimmers. Therefore, it is more difficult and challenging for swimming training and competition one. Childhood is a crucial period. As the saying goes: “kind of melon seeds, bean beans.” Children’s plasticity is extremely strong, their physical form, physical function, heart