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Discussion on health preservation in cold: Nine misunderstandings of cold prevention and warmth preservation are not credible

DailyBird Culture 2021-10-08 1 0

cold solar term is a common gale cooling weather all over the country. If we do not do a good job in cold prevention and warmth preservation, the biting cold will be a great enemy to people's health. However, some methods of keeping warm and expelling the cold in cold winter that have been circulated or used by people for a long time are not so scientific. Today, let Xiaobian summarize the nine misunderstandings of preventing cold and keeping warm in cold season. We must pay attention to avoid them.

大寒防寒保暖九误区

misunderstanding 1: wearing a mask can resist the cold. In fact, the heating effect of the mask is not only bad, but also may reduce the immunity of the human body. This is because there are abundant blood vessels and spongy blood vessel networks in human nasal mucosa, the blood circulation is very active, and it has a natural heating effect on the inhaled cold air. Moreover, human nasal duct is very tortuous, which greatly increases the area of nasal mucosa and further enhances the heating effect.

in this way, when the cold air inhaled by the human body enters the lungs through the nasal duct, it is close to the human body temperature due to the heating effect. However, when a person wears a mask, the air exhaled from the body will be cold and turn into water 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.

in addition, the cold resistance of the human body should also be improved through gradual exercise. If you wear a mask all day, the nasal cavity and the whole respiratory tract can't get exercise because they can't touch the cold air, their immunity will slowly decline, but they are more likely to catch a cold. For women with poor resistance, they can wear scarves, gloves, warm shoes or a thick insole to keep warm. These are more healthy and practical than wearing masks to keep out the cold. Misunderstanding 2 of

and

: the more clothes you wear, the better. Clothes themselves do not generate heat, but only play a role in isolation. They buffer 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. From a physiological point of view, dressing too much will inhibit the adaptability of the body's temperature regulation function and weaken the body's ability to resist the cold. Therefore, clothing in winter can only reach the appropriate thickness. Misunderstanding 3 of

and

: close the doors and windows and catch a cold. Some people close the doors and windows all day in winter. They think that the temperature in the house is high and people are not easy to catch a cold. It's not. According to experts, the human body produces more than 500 kinds of chemicals in the process of metabolism, and 149 kinds are discharged only from the respiratory tract. There are a lot of bacteria, viruses, carbon dioxide and dust in the air. In this air, people are easy to catch a cold and cough, so they should often open windows to keep the air fresh. Misunderstanding 4 of

and

: it is warm to sleep with your head covered. Some people are used to sleeping with your head covered in the quilt. They may feel warmer temporarily, but there will be less and less oxygen in the quilt, but more and more carbon dioxide and dirty gas. Therefore, after sleeping with your head covered, you often feel drowsy and tired.

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