As the saying goes, young people sleep on a cold kang and have strong firepower. In fact, it's not just the young man who has strong firepower. American medical experts say that generally speaking, men have more firepower than women. Why is this?

First of all, men have more muscles and less fat, while women have less muscles and more fat. Muscle consumes a lot of calories and releases a lot of heat energy in the process of oxidizing carbohydrates and fats. Therefore, men's metabolism is fast and women's metabolism is slow. Men consume more calories than women, and the body surface temperature of men is higher than that of women. If men lose weight, the effect is much more obvious than that of women.

Secondly, from a physiological point of view, women are more sensitive to cold than men. This is because the "sensors" in women's skin are more sensitive than men's and will transmit "cold" information to the brain faster. After receiving the "cold" information, the brain will immediately order the metabolic system to work faster, and then order the blood circulation system to retreat to the second line of defense, that is, from the skin, limbs to the trunk. This is why when the temperature is low, people will feel cold hands and feet. When the temperature drops to an unbearable level, the human body will instinctively overreact, that is, the metabolic process will be faster and the blood circulation will retreat faster. In this case, the difference between men and women will be more obvious. Because men have more muscles than women and their metabolism is faster than women; The "sensor" in men's skin is slower than that in women, and the blood circulation system is much slower than that in women. Therefore, at this time, men are still warm and women are cold.

As for why the "sensors" in women's skin are more sensitive than men's, one guess is that women are endowed with the mission of reproducing. During pregnancy, the fetus in the uterus needs a constant temperature environment, and the uterus is in the trunk, so the woman's trunk needs more careful protection. To achieve this goal, the "sensors" in women's skin must be more sensitive, and women's blood circulation system must retreat faster.

First of all, women's body temperature is also affected by estrogen levels, because estrogen can dilate blood vessels. At the beginning of women's menstrual cycle, the estrogen level is very high, blood vessels dilate, and blood circulation spreads to both ends of the whole body skin. This time, the woman's body is warmer. On the contrary, when the estrogen level drops, the blood vessels contract, the blood circulation system retreats to the trunk, and the limbs feel cold.

Second, women's body temperature is also affected by diet. Many women go on a diet to keep fit, and the calories they get from food are not enough. Especially in winter, to keep warm, everyone must consume 100 calories every day to meet the needs of metabolism in the body. Otherwise, once the metabolic rate in the body slows down, the body temperature will drop and women will feel more "cold".

Is it better to be warm forever like a man or cold forever like a woman? American experts disagree. Some men are glad that their metabolism is fast and their firepower is strong. They want to lose weight and lose weight quickly. Although some women are a little jealous of this, they can still comfort themselves. The reason is: If women and men are trapped in the snow forest, women can hold on for a few minutes at the last moment of their lives, because their blood circulation system retreats quickly and consumes less energy, which may be saved. As for the lady who is usually cold, she can go to her husband to keep warm-the heat emitted by her husband is enough to make her feel warm.