I. Table of Activity Standards
For boys, the excellent standard for freshmen and sophomores is 4800-5040ml, the excellent standard is 4300-4550ml, the passing standard is 3 100-4 180ml, and the failing standard is 2300-2940ml. The excellent standard for juniors and seniors is 4900-5 140 ml, the good standard is 4400-4650 ml, the passing standard is 3200-4280 ml, and the failing standard is 2350-3030 ml.
For girls, the excellent standard for freshmen and sophomores is 3300-3400 ml, preferably 3000-3 150 ml, the passing is 2000-2900 ml, and the failing is 1800- 1960 ml. The excellent standard for juniors and seniors is 3350-3450 ml, the good one is 3050-3200 ml, the passing one is 2050-2950 ml, and the failing one is 1850-20 10 ml.
Please note that these data are for reference only, and the actual vital capacity may vary from person to person.
Second, the factors affecting vital capacity
1, age: With the increase of age, various functions of the human body gradually decline, and lung function will also decline, so the older you are, the lower your vital capacity will be.
2. Figure: The higher the height, the larger the lung volume and the larger the alveolar area, so the higher the vital capacity. Obesity will lead to increased gas resistance in chest wall and lungs, weakened respiratory muscle strength, and excessive accumulation of abdominal fat, leading to the decline of diaphragm, which will lead to the decline of vital capacity.
3. Disease: If you suffer from airway obstructive disease, the bronchial wall is infiltrated by inflammation, and the mucosa is congested and edematous, which leads to lumen stenosis, increased resistance and decreased ventilation, which will affect the vital capacity to a certain extent.
4. Smoking: The substances in tobacco will inhibit the movement of epithelial cells in the respiratory tract, cause damage to epithelial cells, make cilia fall off, cells die, and increase airway resistance, thus causing a decrease in vital capacity.
5. Altitude: Under the anoxic environment in plateau area, the air in the lung diffuses, which leads to the expansion of alveolar area and the increase of capillary cavity capacity. Low air pressure, thin air and reduced airflow resistance in plateau area affect vital capacity.
Methods of improving vital capacity
Insist on aerobic exercise
Such as swimming, jogging, cycling, etc. , can increase the strength of respiratory muscles and improve vital capacity.
Deep breathing exercise
By taking a deep breath, you can increase the expansion of the lungs and improve the vital capacity.
sing
Singing needs a lot of oxygen and breathing, which helps to exercise lung muscles and improve vital capacity.
blow up a balloon
By blowing balloons, you can exercise your lung muscles and increase your vital capacity.
Absorb oxygen
In plateau areas or places with thin air, oxygen inhalation can increase vital capacity.
Please note that the above methods are for reference only, and the specific effect varies from person to person. If the lung capacity is low, it is recommended to consult a doctor or professional health care personnel for evaluation and suggestions.