When the weather is cold, why does the body instinct tremble?

When the weather is cold, the body will instinctively tremble in order to increase heat. The human body has the ability of self-regulation. When the body feels cold, it actually shakes spontaneously, hoping to generate some heat to help the body maintain the balance of body temperature.

When the weather is very cold, in fact, the heat dissipation function of human skin will become extremely active. The skin radiates heat faster in winter than in summer, so the body temperature actually drops faster in winter. At this time, in fact, all organs of the human body will produce heat faster, not only internal organs, but also muscles will increase heat. But in winter, due to slow activity, the heat generated by muscles is limited.

Moreover, the metabolism speed will also slow down in winter, and the metabolism of internal organs will also slow down. In addition, in order to increase calories in winter, digestion and metabolism will be accelerated, so in fact, the human body's heat consumption is relatively large. In addition, in the cold environment, the heat generated by various organs of the human body and the heat generated by metabolism are not enough to maintain the balance of body temperature. At this time, the body will shake involuntarily.

In fact, this is the self-regulation of the body, and the jitter of the body is actually the performance of muscle contraction. Although the amount of exercise of the human body decreases in winter, the body will automatically increase the contraction and trembling of muscles, so that the human body will generate a certain amount of heat during this exercise, and the heat generated in a short time is still very much.

Under normal circumstances, if people keep shivering, the heat generated is five times that of the normal metabolism of the body, so the heat generated by shivering in a short time is enough to cope with the energy consumed by the body. Therefore, when the heat generated by the body is not enough, it will tremble, but if the heat generated after trembling is enough, the body will return to warmth, and then the body will stop trembling. So this is actually a process of human self-regulation.