随着夏天的到来,既消暑又有趣的游泳运动吸引了很多青少年加入其中。有研究表明:游泳训练有利于少年儿童柔韧、速度和力量等素质的全面发展,也有利于其身体形态的良好形成。由于游泳采用水中呼吸,呼吸阻力较大,负荷较重。游泳时,心脏每搏量可 As summer approaches, many young people are entertained by the refreshing and fun swimming. Studies have shown that: swimming training is conducive to the overall development of children’s flexibility, speed and strength and other qualities, but also conducive to the good formation of their physical form. As the use of swimming in the water breathing, respiratory resistance, heavy load. Swim, the heart stroke volume can be