健美的体形以先天遗传和后天生活条件为基础,但主要是通过长期的全面身体锻炼而逐渐形成和保持的。经常从事游泳的人,都具有令人羡慕的体形:宽宽的肩膀,结实的胸脯,富于弹性的肌肉,给人以健康、朝气、充满青春活力的感受。这是由于游泳时,有得天独厚的水的环境。游泳时,水的阻力要比空气阻力大800多倍。人们在水中游泳,两臂划水同时两腿打水或蹬水,全身肌肉群都参加了活动。根据流体力学速 Bodybuilding body shape based on genetic and acquired living conditions, but mainly through long-term comprehensive physical exercise and gradually formed and maintained. Often engaged in swimming, have an enviable shape: wide shoulders, strong breasts, flexible muscles, giving a healthy, energetic, full of youthful feelings. This is due to swimming, the unique water environment. When swimming, the water resistance is more than 800 times greater than the air resistance. People swimming in the water, his arms paddling at the same time his legs water or pedal water, the whole body muscle groups have participated in the activities. According to the hydrodynamic speed