Traditional Culture Encyclopedia - Photography major - Why do you hold your breath for so long while dancing in the water?

Why do you hold your breath for so long while dancing in the water?

As graceful as a startling giant, as graceful as a swimming dragon..." Along with the poem, the actor transformed into the "Goddess of Luo" and appeared underwater. A 2-minute underwater dance reproduced the Jian'an talent Cao Zhi The famous "Luo Shen Fu", this "underwater flying" dance is absolutely beautiful from color to artistic conception, and it has amazed thousands of netizens. The opening dance "Luo Shen Shui Fu" broadcast on Henan Radio and Television Station. , which made netizens applaud.

So, how does the "Luoshen" girl dance lightly in the water?

How is the gas exchanged during underwater dancing? >

Behind the beautiful dance is hard work. The entire dance lasts 1 minute and 54 seconds, which may not seem long, but it is a huge challenge for the underwater performers. According to the performers, the real shooting time. There are more than 30 hours, and the average time under water is 5-6 hours a day. During the filming process, the dancers first adjust their breathing on the surface of the water, and then go into the water for 50 seconds. They have to go in and out of the water 200 times a day. In order to ensure that they can successfully complete the movements in the water, the dancers also carry weights ranging from 2 to 10 kilograms.

How do the actors breathe underwater? ? This involves the principle of human gas exchange!

The human body’s gas exchange depends on the respiratory system, which consists of the respiratory tract and lungs. The respiratory tract is composed of the nose, pharynx, larynx, trachea, and bronchi. After being filtered, moistened, and warmed by the respiratory tract, the carbon dioxide produced throughout the body is discharged into the external environment along the respiratory tract.

On average, humans involuntarily breathe about 12 times per minute. This breathing cycle, like the heartbeat, is one of the two major biological rhythms of the human body. The brain can adjust the breathing rhythm according to the needs of the human body without conscious command.

< p>But everyone has the ability to consciously hold their breath for short periods of time to prevent water or dust from entering our lungs, to maintain the size of our chests before moving our muscles, and to speak long sentences in one breath. Miss "Luo Shen" relies on holding her breath to dance underwater.

How long can a person hold her breath for at most?

Scientific research and daily experience tell us that most people, after inhaling air to the maximum extent, You can only hold your breath for about 1 minute at most, because the oxygen your lungs can hold alone can last for about 4 minutes, but almost no one can hold their breath close to this value without training. At the same time, within 1 minute. At this limit, the carbon dioxide that needs to be exhaled has not accumulated to a toxic concentration in the blood. If you hold your breath for too long, you may lose consciousness and faint.

But under normal circumstances, adults will not hold their breath. Breathing and coma. Insufficient oxygen or excess carbon dioxide will damage the brain, but before that, there will be some reasons that make us reach the break point and cannot help but breathe.

The so-called breath holding. Pole is the moment when you feel you have to gasp after holding your breath for a while. So how does this breath-holding pole come about?

Some scientists believe that the generation of the breath-holding peak is related to the diaphragm. The diaphragm actively contracts for a long time to keep the chest expanded, thereby achieving the effect of holding your breath. Most evidence agrees that the diaphragm sends a "discomfort" signal to the brain, telling it how long it has been holding its breath. The brain then subconsciously weighs this signal and other factors to determine how much discomfort is tolerable.

Breath-holding training and precautions

Similar to methods such as meditation, inhaling pure oxygen, and removing carbon dioxide from the body, training can delay the emergence of the breath-holding extreme. Miss "Luoshen" can hold her breath and dance underwater through extensive training. Generally speaking, people who hold their breath for extremely long times tend to follow the following four key principles:

First, keep the lungs extremely full. Some athletes can expand their lungs beyond their normal maximum capacity. They use a technique called oral suction, which involves rhythmic movements of the floor of the mouth to draw in more air. However, increased pressure in the lungs increases the risk of arterial gas embolism, in which air bubbles in the blood can damage the brain or coronary capillaries.

Second, keep your whole body relaxed and lower your metabolism. When a person is in a resting state, metabolism consumes approximately 0.36 liters of oxygen per minute. After fasting for 12 hours and lying still, oxygen consumption will be even lower, only 0.27 liters per minute, and the time that the air in the lungs can be supported will be extended by 33%.

Third, inhale pure oxygen. Typically, fresh air contains only 21% oxygen. Studies have shown that inhaling pure oxygen can double the breath-holding time. But doing so also increases the potential danger. Once the oxygen in the lungs is used up, some parts of the lungs may shrink.

Fourth, excessive breathing. Breathing excessively before holding your breath can lower carbon dioxide levels in the blood, and studies have shown that this practice can sometimes double the duration of a breath hold. But the side effect is that the body uses up oxygen and produces carbon dioxide faster. In addition, excessive breathing limits blood supply to the brain, which would otherwise protect the brain from damage due to lack of oxygen.

It should be noted that extending the breath holding time will bring great danger. Holding your breath for too long can cause a person to lose consciousness, cause brain damage, and in severe cases, even lead to death.

Therefore, please do not try to hold your breath for a long time easily. If you need to hold your breath for a long time, you must ensure that there is medical assistance around you.