The so-called low temperature means that the ambient temperature is lower than 10 degrees Celsius. Strictly speaking, the real temperature of human body should also consider the comprehensive factors such as air humidity and wind speed at that time. The influence of low temperature on human body is complex, involving the intensity, time and mode of low temperature. For example, suddenly entering a low-temperature environment, the body gradually adapts to the sudden cold and working in a low-temperature environment for a long time, and its stress level is different. In addition, the physiological state of the body itself, the nature and conditions of work and the tolerance to low temperature are also quite different. So the demand for nutrition is different.

At low temperature, it is best to keep in good health. Just like watering thirsty plants. When is the best time? The sunshine is strong in spring and summer, and nourishing yin is like watering at noon, which will be wasted by evaporation. If you water at night, it will not only reduce evaporation, but also be supplemented by night dew. In winter, the yin is strong and the yang is weak, just like heaven helps.

So keeping healthy at low temperature is like watering flowers at night. Traditional Chinese medicine believes that winter is a season of "storing and receiving" and a day to recharge your batteries. At this time, the goal of health preservation is to nourish yin. "Yin" is like a kind of "functional fluid" in our body, which is most suitable for tonic at low temperature, especially for those who lack functional fluid or overspend the day after tomorrow.

But low temperature can lead to abnormal physiological function of human body.

1, easy to fatigue

When the temperature drops by 65438 0℃, the enzyme activity will decrease by 50%, and people will be easily tired.

2, the immunity is reduced

When the body temperature drops by 65438 0℃, the immunity of white blood cells will decrease by 37%, so people with hypothermia are more likely to catch a cold when the seasons change.

3. Autonomic nerve function and hormone balance are affected.

Hypothermia will affect autonomic nervous function and make hormones out of balance, so irregular menstruation or premenstrual syndrome in women may be related to this.

4. The basal metabolic rate decreased.

Low body temperature is not easy to consume calories, which will reduce cell metabolism and worsen 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.

5. Blood circulation becomes worse.

People with hypothermia will contract peripheral blood vessels such as hands and feet, so it is naturally difficult for blood to circulate. Moreover, because the power of the heart to transport blood is weakened, the blood circulation of the whole body will also become worse.