Why does the body tremble when it is cold?

In winter, when we feel cold, our bodies often tremble unconsciously, which is what we often say. I think we should all know.

In fact, this is the self-protection mechanism of the human body, just like people with high temperatures will automatically sweat. In cold weather, the most important thing for cold resistance and survival is to keep the temperature of important parts of the body around 37 degrees.

In order to achieve this goal, our body will use various "tricks": the body will spontaneously adjust the production and consumption of energy in the body, thereby reducing the energy consumption in the body and maintaining the heat in the body; Reduce the blood flow of peripheral skin, thus reducing the body's heat loss to the environment, which is why these parts (such as hands and feet) have the lowest temperature and the fastest cold;

The other is that the body will spontaneously tremble to generate heat, which is commonly called trembling. The drop of skin surface temperature stimulates nerves to send signals, and muscles contract violently, leading to chills. With this in mind, you can walk around the office in winter. With the end of the influence of cold air, most parts of the country will resume the state of scarce precipitation. Due to insufficient precipitation, the clear sky radiation will obviously cool down, and the lowest temperature in the south will continue to be low, especially in the south of the Yangtze River. The lowest temperature is generally around 0℃, and the weather is very cold. Pay attention to cold protection and warmth.

Cold air is still very active and will appear in turn, but the intensity will not be too strong. Generally speaking, the highest temperature in most parts of the country will gradually return to normal or slightly higher than normal. However, because it will be sunny and rainy next week, the minimum temperature in many places in the south will still be low, and the temperature difference between morning and evening will exceed 10℃, and the weather will be very cold. Pay attention to keep warm and cold.