人在做最大深吸气后再做最大呼气时呼出的量,被称为“肺活量”。现代医学揭示,人到35岁左右时,肺活量即逐渐下降。肺活量的减少意味着机体摄氧量的减少。健康人的肺每天可为身体的各个细胞输送总量达800升的氧气。人进入老年后,由于肺活量的减少,动脉血氧的饱和度比青年人低5％～10％。美国医学专家在过去的30年中,以5200多人做了 The amount of exhaled breath that a person makes during their maximum expiratory exhalation is known as “vital capacity.” Modern medicine reveals that when the person reaches 35 years of age, the vital capacity gradually declines. Reduction in vital capacity means a reduction in oxygen uptake in the body. Healthy human lungs can deliver up to 800 liters of oxygen per day to the body’s individual cells. After entering the elderly, due to decreased lung capacity, arterial oxygen saturation of 5% to 10% lower than young people. American medical experts have done more than 5200 people in the past 30 years