Do I need to wear a mask when running in winter?

You don't need to wear a mask for running in winter, because the heating effect of the mask is not only bad, but also may reduce the immunity of the human body. When a person wears a mask, the air exhaled by the body will turn into water when it cools 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. Winter is one of the four seasons, between autumn and spring. Astronomically speaking, it is from February to March, 65438+. China used to refer to the three months from beginning of winter to beginning of spring, as well as the three months of October, November (winter solstice) and December (twelfth month) in the lunar calendar. The time in the northern and southern hemispheres is different. According to the meteorological significance, in the temperate and cold regions of the southern hemisphere, winter is in June, July and August (or May 2 1 to August 22 according to the constellation standard), in the temperate and cold regions of the northern hemisphere, winter is in the solar terms of 12, 1 and February (or according to the constellation standard/kloc-0) Westerners generally call winter the solstice and spring the winter. From the climatological point of view, it is winter when the average temperature is lower than 10℃ for five consecutive days.