Why are you lazy when it is cold in winter?

In winter, the weather is cold and the temperature is low. For us, the normal body temperature is about 36.5 degrees. The temperature drop will affect the blood circulation, leading to slower metabolism, thus showing a lazy state.

It can also be seen from the animal kingdom that in order to preserve themselves, cold-blooded animals minimize their metabolism in winter-hibernation; In addition, animals such as polar bears hibernate to reduce metabolism and store energy.

It's very cold in winter, and people become lazy. From a natural point of view, it is a manifestation of people's adaptation to the living environment.