Spring sleepy autumn sleepy, summer sleepy winter sleepless in March ... when will we be less sleepy?

There has been a saying since ancient times: spring is sleepy, autumn is short, summer is sleepy, winter is sleepy, and March is sleepless.

In the early spring, the earth thaws and everything recovers, showing a vibrant scene. But at this time, people feel very tired and can't lift their spirits. This lazy phenomenon is called spring sleep.

Experts explained that spring sleepiness is not morbid, but a physiological phenomenon of human body: once the external climate changes, the blood circulation of human body will be adjusted accordingly. Stimulated by cold in winter, the blood flow of skin capillaries decreases, but the blood flow of brain and viscera increases relatively, and the brain is provided with sufficient oxygen, so people often have a clear head in winter. In spring, with the increase of temperature, the skin capillaries and pores expand, the blood circulation on the body surface is vigorous, and the supply of blood and oxygen flowing into the brain decreases, which leads to the decrease of the excitability of brain cells, so there is a phenomenon of weakness, listlessness and drowsiness in spring sleep.

As the saying goes, it is good to go to bed early and get up early. Ensuring a certain amount of sleep in spring can reduce daytime sleepiness. This does not mean that the more time you sleep, the more you can eliminate the spring sleep. Spring brings vitality to the earth and is a good opportunity for people to have outdoor activities. People walk, jog, do exercises and punch in the morning exercise; Holidays, outings, mountain climbing, etc. Will improve the body function, so as to quickly adapt to climate change. This is a positive measure to prevent spring sleepiness.

In midsummer, the weather is hot, the human body is difficult to emit heat, the skin is sticky and wet, and the body temperature rises; Excessive sweating makes water and salt metabolism disorder, gastrointestinal function weaken, cardiovascular system burden increase, nervous activity tension increase, and energy consumption increase. In summer, we can't get enough sleep and comfortable climate, and excessive energy consumption can't be properly compensated, so we owe a summer consumption debt. In September, the hot summer is quietly replaced by autumn. The temperature is moderate at this time. The breeze blows, refreshing the mind. Autumn is really a good season. However, various physiological systems of the human body have changed accordingly, sweating has decreased, body heat has been generated and discharged, the metabolism of water and salt has returned to daily balance, digestive function has returned to normal, cardiovascular burden has been reduced, and human energy metabolism has reached a basically stable level, so the body has entered a periodic rest stage. Since the autumnal equinox, the sunshine time has been shortened day by day, basically half a day and half a night of yin and yang. Autumn night is the easiest time to fall asleep, sleeping deeply and sweetly, but after waking up in the morning, I still feel very tired and want to continue sleeping. This is what people call autumn shortage.

Therefore, the lack of autumn is a compensation response to the extraordinary consumption of human body in midsummer, and also a restoration measure to the pleasant and comfortable climate environment of human body in autumn. It can also be said that the internal and external environment of the human body is a transitional phenomenon to achieve a new balance.

The ancients also used "spring sleep" as the material, or talked about old feelings. Jin Changxu wrote about a woman's yearning for her husband in "A Complaint in Spring": "When the oriole is driven away, all the fun comes from the tree. When she dreamed that she went to meet him in Liaoxi camp, they woke her up. " In addition, Du Fu's "Swallows fly in the mud and Yuanyang sleeps in the warm sand" vividly describes the reasons for "spring sleep" by the fact that swallows fly around and nest in the mud, the sun is shining and the sand is warm.