The great cold is coming. Have you fallen into three misunderstandings of dispelling cold and keeping warm?

summary

Great cold is a very cold season, so when the great cold is approaching, what are the misunderstandings of expelling cold and keeping warm? Now let's have a look.

The great cold is coming. Have you fallen into three misunderstandings of dispelling cold and keeping warm?

First: the more clothes you wear, the better - clothes do not generate heat, but only act as 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 the physiological point of view, too much clothing will inhibit the adaptability of body temperature regulation function and weaken the body's ability to resist the cold. Therefore, winter clothing as long as the appropriate thickness can be achieved.

Second: close the doors and windows, less cold - some people close the doors and windows all day in winter, think that the temperature inside the house is high, people are not easy to catch a cold. Not really. Experts said that the human body will produce more than 500 kinds of chemical substances in the process of metabolism, and only 149 kinds of chemical substances are discharged 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 easy to catch cold and cough. Therefore, windows should be opened frequently to keep the air fresh.

Third: wearing a mask can resist the cold - in fact, the heating effect of the mask is not only bad, but also may reduce the body's immunity. This is because the nasal mucosa is rich in blood vessels and spongy vascular network, blood circulation is very active, the inhalation of cold air has a natural heating effect, and the human nasal duct is very tortuous, greatly increasing the area of the nasal mucosa, making the heating effect further enhanced. In this way, when the cold air inhaled by the human body enters the lungs through the nasal tube, 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 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 unhygienic environment is not conducive to the health of the mouth and nose. In addition, the cold resistance of 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 contact with cold air, and the immunity will slowly decline, on the contrary, they are more likely to catch a cold. For women with poor resistance, they can wear scarves, gloves, warm shoes or thick insoles to keep warm when they go out. These are more healthy and practical than wearing masks to keep out the cold.

matters needing attention

It's warmer to sleep with your head covered - some people are used to sleeping with your head covered in the quilt, which may feel warmer for the time being, but the oxygen in the quilt will be less and less, while the carbon dioxide and unclean gas will accumulate more and more, so after you sleep with your head covered, you often feel drowsy and tired.