Why do adults say that wearing too many clothes in winter will reduce resistance?

It's cold, so naturally we should put on more clothes. Many people think that the more clothes we wear, the warmer our bodies will be. When we are indoors, we should also close the doors and windows and sleep with our heads covered. These seemingly warm-keeping methods are actually wrong ways to keep warm.

Myth 1: The more clothes you wear, the better.

Clothing itself does not generate heat, but only plays the role of isolation. It buffers the convection between the cold air outside and the hot air on the body surface, so that the heat of the human body can be preserved. Physiologically speaking, wearing too much clothes will inhibit the adaptability of the body's thermoregulation function and weaken the body's ability to keep out the cold. Therefore, dressing in winter can only reach a suitable thickness.

Myth 2: Wearing a mask can keep out the cold.

In fact, the heating effect of masks is not only bad, but also may reduce human immunity. This is because the human nasal mucosa is rich in blood vessels and spongy vascular network, and the blood circulation is very active, which has a natural warming effect on the inhaled cold air. Moreover, the human nasal duct is very tortuous, which greatly increases the area of nasal mucosa and further enhances the warm-keeping effect.

In this way, when the cold air inhaled by the human body enters the lungs through the nasal catheter, it is close to the human body temperature due to the heating effect. However, when a person wears a mask, the air exhaled by the body will turn into water when it is cold on the mask. On the one hand, it will make the face feel colder, on the other hand, the humid and relatively unsanitary environment is not conducive to the health of people's mouth and nose.

Myth 3: Drinking more can keep out the cold.

The weather is extremely cold. Even women who are not good at drinking usually like to reunite with their families or get together with friends. They thought it was snowing outside the window and everyone in the room was drinking enthusiastically, which was romantic and comfortable. Drinking alcohol does make people feel hot all over the body, which is the result of alcohol prompting the human body to emit primitive heat energy.

However, after drinking, the body will release a lot of heat, which will make people get goose bumps all over the body, leading to a cold after drinking. And if you go out after drinking, you are more likely to catch a cold because of cold outside and heat inside.

Myth 4: Washing your face with hot water is warmer.

Women are generally afraid of cold and are used to washing their faces with hot water in winter, but you must have learned the principle that heat expands and cold contracts, and human skin also follows this principle. In winter, people's face is stimulated by cold air, sweat glands and capillaries are in a state of contraction, which will expand rapidly when encountering hot water, but after the heat is emitted, it will return to a state of low temperature.

Myth 5: Close the doors and windows and catch fewer colds.

Some people keep their doors and windows closed all day in winter, thinking that the indoor temperature is high and people are not easy to catch a cold. Actually, it is not. According to experts, the human body will produce more than 500 kinds of chemicals in the process of metabolism, and only 149 kinds are excreted from the respiratory tract. There are a lot of bacteria, viruses, carbon dioxide and dust in the air. In this kind of air, people are prone to colds and coughs, so we should always open the windows to keep the air fresh.

Myth 6: It's warmer to sleep with your head covered.

Some people are used to sleeping under the covers. They may feel warm for a while, but there will be less and less oxygen in the hood, and more and more carbon dioxide and unclean gas. Therefore, after sleeping with your head covered, you often feel groggy and tired.