What is Spirometry?

Vital capacity refers to the volume of air that you try to exhale after maximum inspiration. Including tidal volume, inspiratory and expiratory volume. Tidal volume refers to the volume of air inhaled or exhaled by the lungs during a breathing cycle. The maximum volume re-inhaled beyond the tidal volume is the supplemental volume, and the maximum volume re-exhaled outside the tidal volume is the supplemental volume. The amount of air remaining in the lungs is the remaining air. There are large individual differences. Affected by age, gender, size, strength of respiratory muscles, and lung and chest elasticity. Generally speaking, the stronger your body, the bigger it is. Studies have shown that it is highly correlated with maximum oxygen uptake. It is often used as an index to evaluate human body quality. ^[1]

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Vital capacity refers to the volume of air that you try to exhale after maximum inspiration. Including tidal volume, inspiratory and expiratory volume. Tidal volume refers to the volume of air inhaled or exhaled by the lungs during a breathing cycle. The maximum volume re-inhaled beyond the tidal volume is the supplemental volume, and the maximum volume re-exhaled outside the tidal volume is the supplemental volume. The amount of air remaining in the lungs is the remaining air. There are large individual differences. Affected by age, gender, size, strength of respiratory muscles, and lung and chest elasticity. Generally speaking, the stronger your body, the bigger it is. Studies have shown that it is highly correlated with maximum oxygen uptake. It is often used as an index to evaluate human body quality. ^[1]

Vital capacity (VC) refers to the total amount of gas that is expelled after one best effort inhalation.

Vital capacity is closely related to human breathing. Physiological studies show that: organs, systems, tissues,

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Vital capacity and aging

Vital capacity refers to the total amount of gas that can be exhaled after one best effort inhalation. It is the maximum ventilation capacity for one breath and can reflect the potential capacity of respiratory function in a certain sense.

Vital capacity can show a person's cardiopulmonary function. People with large vital capacity have a stronger ability to supply oxygen to the body.

The lungs are a relay station for gas exchange. The body needs oxygen every moment of its operation. Only when the oxygen supply is sufficient can various organs work normally. At the same time, carbon dioxide produced by the body's metabolism is also excreted through the lungs. Therefore, the lung capacity is large, and the ability to inhale oxygen and exhaust gas is stronger. During long periods of study and physical exercise, the human body needs to consume a large amount of oxygen. At this time, people with large vital capacity rarely experience inattention, dizziness, and chest tightness. Under hypoxic conditions such as plateau, people with large vital capacity can allow more fresh air to reach the alveoli, thereby obtaining sufficient oxygen in a hypoxic environment. People with strong lung function have a strong ability to exhale and exhale, and have greater ability to control sound. It can be said that strong lung function can make the brain more flexible and healthier.

35-year-old spirometry begins to decline

Vital capacity varies by gender and age, with men significantly higher than women. Vital capacity is also closely related to height, weight, and bust. Generally speaking, people with similar age, height and weight within the normal range will not have much difference in vital capacity. If you take a deep breath and blow the same elastic balloon, the person with the larger balloon will have better lung capacity.

In national fitness standards, spirometry is generally used to test the vital capacity. In daily life, people can come to me to test by climbing the floor. For example, at the age of 25, the human's cardiopulmonary function reaches the optimal state. At this time, if you climb 4 stairs continuously, you breathe naturally, but only a little rush, indicating that the vital capacity is basically normal; if you feel difficulty breathing and panting, it means that the vital capacity may be lower than normal Standard, need to strengthen exercise. Older people can slow down and lower floors when testing.

Decreased vital capacity will accelerate human aging. Generally after the age of 35, lung capacity begins to gradually decrease with age. At this time, the oxygen supply of the human body is reduced by 5% to 10% than when young, and organ aging will also accelerate. But if you can persist in physical exercise, you can significantly improve cardiopulmonary function and slow down human aging. Many long-distance runners and swimmers in their forties and fifties have a lung capacity equivalent to that of young people in their twenties, and their physiological age is also relatively young.

Spirometry body mass index

Spirometry body mass index:

The spirometry body mass index is one of the anthropometric composite indexes and is an important human respiratory function index.

The spirometry body mass index mainly reflects the correlation between the vital capacity and body weight by the ratio of the human's own vital capacity to body weight, that is, the relative value of the vital capacity per 1 kg of body weight. . It has a certain reference role in the selection of athletes and comprehensive evaluation of students' physical fitness related to the oxygen metabolism project. The calculation formula is: vital capacity / body weight. Units of measurement: milliliter (ml) for vital capacity and kilograms (kg) for weight.

Spirometry body mass index measurement method:

The total amount of gas that the human body takes to inhale deeply and exhale as hard as possible is part of the dynamic breathing process. The measured vital capacity of the subject is divided by the kilogram weight value measured on the day, and the quotient is the vital capacity index.