Vital capacity test method

Our lung capacity is checked during every physical examination during school. We take a deep breath through an instrument, and the instrument can quickly detect the size of our lung capacity. The lung capacity test is also a standard to detect whether the body is healthy. Each of us relies on oxygen to breathe. The size of the lung capacity directly determines the amount of oxygen supplied to your body. The greater the oxygen supply, the healthier the various organs in the body, such as the heart and lungs. Once there is a problem with lung capacity, various physical discomforts will generally occur.

When studying or doing sports for a long time, the human body needs to consume a lot of oxygen. At this time, people with large lung capacity rarely experience phenomena such as inattention, dizziness, and chest tightness. In hypoxic conditions such as those at high altitudes, people with large lung capacity can allow more fresh air to reach the alveoli, thereby obtaining sufficient oxygen in a low-oxygen environment. People with strong lung function have stronger ability to exhale and exhale, and have a stronger ability to control sound. It can be said that strong lung function can make people's brains more flexible and their bodies healthier.

Vital capacity refers to the amount of gas exhaled to the greatest extent possible after a maximum inhalation without time limit. This represents the maximum functional activity of the lungs at one time and is one of the important functional indicators reflecting the growth and development level of the human body. The "National Student Physical Fitness Standards" require that lung capacity is a compulsory test item for students in fifth and sixth grades of elementary school, as well as students in junior high school, high school, and college.

Lung capacity is closely related to human breathing. Physiological research shows that the human body's organs, systems, tissues, and cells consume oxygen every moment, and the body can only function normally when there is an adequate supply of oxygen. The human body's internal oxygen supply is entirely obtained through breathing through the lungs. During the breathing process, the lungs not only take in oxygen, but also expel carbon dioxide metabolized from the body. We can think of it this way: the lungs are the transit station for the body's gas exchange. The volume of this transit station directly determines the amount of gas exchange during each breath. This is the most intuitive and objective indicator for testing lung function.

How to measure vital capacity to body weight index:

The total amount of gas that is exhaled after the human body takes a deep breath with all its strength is part of the dynamic process of breathing. The quotient of the subject's actual vital capacity divided by his or her weight in kilograms measured on that day is the vital capacity index.

Vital capacity to weight index:

The vital capacity-to-weight index is one of the composite indicators of anthropometric measurement and an important index of human respiratory function.

The vital capacity-to-weight index mainly reflects the correlation between vital capacity and body weight through the ratio of a person's vital capacity to body weight, that is, the relative value of vital capacity per 1 kg of body weight. It is used to conduct objective quantitative comparative analysis of individuals and groups of different ages and genders. It plays a certain reference role in the selection of athletes for oxygen metabolism events and the comprehensive evaluation of students' physical fitness. The calculation formula is: vital capacity/body weight. Unit of measurement: Vital capacity is measured in milliliters (ml) and body weight is measured in kilograms (kg).