What do you mean by spring sleep, summer fatigue, autumn sleep and hibernation?

When the climate gets warmer in spring, people will feel sleepy, tired and dizzy, which is spring sleep;

Affected by mild qi and human factors, the functions of various organs of the body, including muscle function, are still at a low level, and they are sleepy during the day. This is a long summer;

It's getting cold in autumn, people are depressed and always want to sleep, that is, take a nap in autumn;

Hibernation refers to the extreme decline of life activities in winter, which is an adaptation to the cold environmental conditions in winter.