What are the effects of low temperature on human body?

It is easy to get tired. When the temperature drops to 65438 0℃, the activity of enzyme will decrease by 50%, so people are easy to get tired. Immunity is reduced. When the body temperature drops by 65438 0℃, the immunity of white blood cells will decrease by 37%. Therefore, people with hypothermia are more likely to catch a cold when the seasons change. Autonomic nerve function and hormone balance are affected, which will affect autonomic nerve function and make hormones out of balance, so irregular menstruation or premenstrual syndrome in women may be related to this. When the basal metabolic rate decreases, the body temperature is not easy to consume calories, which will decrease the cell metabolism and worsen the skin. Every time the body temperature drops by 1℃, the basal metabolism will decrease by 12%, and the ability to consume calories will be weakened, so even if people eat the same food, people with low body temperature are prone to gain weight. Blood circulation becomes worse. People with body temperature, hands and feet and other peripheral blood vessels will tighten, and blood will naturally not circulate easily. The blood circulation of the whole body will also become worse because of the weakening of the power of the heart to transport blood.