人上了年纪之后,有时候就连爬楼梯都会气喘吁吁,这是因为肺活量下降的缘故。所谓肺活量,是指一个人尽力吸气再尽力呼气所呼出的总气体量,它在一定程度上反映了人体新陈代谢活动供氧的潜在能力,医学界也把肺活量作为衡量中老年人衰老与否的标准之一。一般情况下,健康人的肺每天可为机体提供800升总量的氧气。而人到35岁左右时,肺活量便开始逐渐下降,大约每10年会下降18%,到了 After people get older, sometimes even the stairs will be breathless, because of reduced vital capacity. The so-called vital capacity, refers to a person trying his best to breathe exhaled exhaled gas, which to some extent reflects the potential of the human body’s metabolic activity of oxygen, the medical profession is also the vital capacity as a measure of aging in the elderly or not One of the standards. In general, healthy human lungs provide 800 liters of oxygen to the body daily. When people reach the age of 35, their vital capacity begins to decline gradually, which will drop about 18% every 10 years.