Is it safer for students to wear KN95 masks in physical education? - Industry news

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Is it safer for students to wear KN95 masks in physical education?

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It is not advisable to wear a mask in physical education class. In June, the epidemic situation in various countries in the world was gradually brought under control, and some places gradually began to resume classes. However, for safety reasons, students still wear KN95 mask during class, and even wear physical masks for physical exercise. But there are certain risks in doing so. Children's cardiopulmonary function is still in the development stage, wearing a mask for physical exercise is easy to cause damage to cardiopulmonary function. Now that the school has started, there is generally no risk of not wearing a mask.
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Tang Yongjun, a professor of respiratory medicine at Xiangya Hospital of Central South University in China, told reporters that the first principle for children to choose masks is comfortable ventilation. Although KN95 masks are highly protective, they are not conducive to ventilation, so they cannot wear KN95 masks for running, playing sports, and other sports. Some children also wear masks during physical education classes, which is actually not desirable. It is not recommended that children wear masks for intense exercise training to avoid symptoms such as dizziness and chest tightness.
Doctor reminds
Wang Yuedan, Professor of Immunology, Peking University School of Basic Medicine, reminded that even when an adult wears a KN95 mask, the time should not exceed 4 hours at a time. If the KN95 mask is used for a long time, it will cause lung damage and may cause emphysema. Kind of problem. At the same time, each person's breathing volume, speech frequency and exercise volume are different. Under normal circumstances, it is enough to use a disposable mask to change every day.

Zong Zhiyong and Wang Yantong, experts in the Department of Infection Management of West China Hospital of Sichuan University, suggest that children under 7 years old should not wear KN95 masks, even if they are made with special air valve N95 masks, because the respiratory resistance will be too large There is a risk of suffocation.

Generally speaking, the filtration efficiency of a mask is inversely related to the permeability. In other words, the higher the filtration efficiency, the worse the air permeability. KN95 mask can filter out 95% of tiny particles, which will inevitably affect its breathability. Wearing it for a long time will lead to lack of oxygen, and feel drowsy, dizzy and chest tight. It is not recommended that children wear masks for strenuous exercise, which may cause hypoxia. If your child needs to take physical education classes, it is recommended to take it out in a ventilated outdoor area. You don’t need to wear a mask when doing physical activities. Try to choose sports that can maintain a certain distance, such as doing exercises and avoid close contact.

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