In spring, it's warm and cold, and the air flow is one after another, and the air pressure is unstable. Sometimes it's sunny in the morning and sunny at noon in Ran Ran, but the cold wave strikes at night. A poem by Wang Anshi vividly describes the climate in spring: sometimes the spring breeze is good, and sometimes it is bad. No spring breeze can blossom, and flowers are blown down by the wind. Spring is a season of frequent diseases.
Spring covers autumn and freezing means: spring is not busy reducing clothes, and autumn is not busy adding crowns. Why? Because after a cold winter, under the protection of warm cotton-padded clothes, blood vessels are contracting, the whole blood circulation is slow, the function of body temperature regulation system is reduced, and the ability to resist diseases is therefore relatively low. Therefore, if you are busy reducing clothes in spring, wear thin clothes, and encounter weather changes or cold in late spring, you will easily catch cold and cause diseases such as colds. As the saying goes, on April 8, ducks froze to death. In spring, the climate changes greatly, sometimes cold and sometimes hot. You can't get used to it if you take off too much. It's better to cover it up. In the book "Lao Zi Heng Yan", it is said that the spring cold has not disappeared, and the clothes on the upper body are slightly reduced, but the pants, socks and shoes on the lower body would rather keep warm. Especially for the elderly, the ancient people's "On the Essentials of Health Preservation" said: the elderly are weak in popularity, weak in bones and timid, and cold in gas is easy to hurt the body. When they are ready, they are warm and easy to get, reducing a weight, so they can't be deleted violently. Just don't take off the old man's cotton-padded clothes too early, prepare some clothes and increase or decrease them at any time according to the weather.
Why should it be frozen in autumn? Because the climate in autumn is getting colder and colder, only by gradually increasing clothes can people adapt to the climate change. Wear thin clothes, the body can withstand cold exercise and improve cold tolerance. If you wear cotton-padded clothes when the weather just turns cold, it will reduce the chance of your body contacting with the cold, and you will not get exercise, and your cold resistance will also be weakened. In the cold winter, you will inevitably be unable to adapt, which will easily lead to diseases such as colds, bronchitis and tonsillitis. So it's better to freeze in autumn. However, in order to reduce diseases and maintain health, we should pay attention to climate change and master it properly.
Because spring is characterized by being warm and cold at first sight, it is easy to catch cold when taking off thick clothes too early, so it is called "spring cover". Autumn is characterized by cool in the morning and evening, hot at noon, and it is easy to catch a cold if you wear too many clothes.
"Spring covers and autumn freezes" is a folk health-preserving proverb in China. It is scientific to analyze it from the perspective of climatology.
Although spring and autumn are both transitional seasons, there are still differences. In China, March-May is usually called spring, and September-165438+1October is called autumn. The average maximum temperature in spring is higher than that in autumn; The average minimum temperature in autumn is higher than that in spring.
This shows that although the daytime temperature is higher in spring, it is still lower in the morning and evening. In addition, spring is a recovery period, and the indoor temperature does not rise as fast as that outside, so it is very hot outside in spring, but it is cooler when you enter the room. On the other hand, autumn is a cool season. Although the outdoor temperature has dropped, the indoor temperature is still relatively warm.
Therefore, if you don't "cover" it in spring and take off your cotton-padded coat in case it gets hot, you may not be able to fully adapt to the temperature in the morning and evening and indoors. Therefore, I advise you not to take off your cotton-padded clothes too early and cover them for a while, which is beneficial to health care in spring. Autumn is "not cold". When it is cold, clothes are added, which is not suitable for indoor temperature. Because autumn has just turned cold and the cold days are still behind, it is also helpful to wear less clothes and improve the cold resistance and resistance.
In spring, cold air from the north will continue to invade China, and its frequency and intensity are higher than those in autumn. In order to adapt to frequent temperature changes and strong winds, clothes in spring are warmer than those in autumn.