Measurement and evaluation of vital capacity
Vital capacity is the amount of air that a person can exhale after trying to inhale and exhale. The vital capacity of adult males is about 3500 ~ 4000 ml; The adult female is about 2500 ~ 3000 ml. Vital capacity reflects the volume of the lung and the expansion ability of the lung. Adult's vital capacity decreases with age, and exercise can slow down this process. The vital capacity decreases by 9% ~ 27% every 10 year. The decline of vital capacity leads to many diseases that affect lung health in old age, such as bronchitis, asthma, pneumonia, pulmonary embolism, pulmonary fibrosis, lung tumor and so on. More importantly, once these lung diseases are combined with other diseases, the mortality rate is very high. People who insist on physical exercise for a long time can still maintain normal lung capacity, so they should actively carry out respiratory exercise to give full play to the potential of lung function and delay the decline of lung function. The medical community has taken vital capacity as the first choice to detect human aging.
At present, there are drum spirometers and electronic spirometers. Pay attention to (1) standing posture during the test. You can take several deep breaths and several groups of chest expansion exercises first. (2) Deep inhalation and deep exhalation should be sufficient during the test, and you can bend over when exhaling; (3) To prevent air leakage and exhalation through the nose, it is best to use a nose clip and test it three times to get the maximum value.
According to the criterion, the average vital capacity of men over 40 years old is between 2800 and 3300 ml, and that of women is between 2200 and 2500 ml. Therefore, all individuals in this range have good lung function. For a long time, everyone should do breast enlargement and breast enlargement twice a day. Practice: first make a fist, then push and pull left, right, up, down, front and back for about 50 times. Especially those who work at their desks for a long time, they should insist on doing chest expansion for a long time, preferably after getting up every day and before going to bed, which can effectively prevent the decline of vital capacity.