英语作文,游泳的好处,带翻译

Movement in the water, all organs are involved, more energy, blood circulation is facilitated in order to supply more nutrients organ movement. The acceleration of the blood will increase the load on the heart, to speed up the beat frequency, strong contraction. Regular swimmer, heart function is excellent. The heart rate is generally 70 - 80 beats / min, stroke volume is 60 - 80 ml. Heart rate and often swim up to people 50 - 55 beats / min, a lot of good swimmers, heart rate can reach 38 - 46 beats / min, stroke volume up to 90 - 120 ml. The role of the water when swimming easy to return blood to the heart of limbs, the heart rate.Swimming there will be significant long-term movement of the heart was increased, a strong contraction, increasing vascular wall thickness to increase flexibility, increase blood volume per stroke. Therefore, swimming can exercise a one strong heart