American medical researchers have found that at the same temperature, women actually feel colder than men. For example, in the severe winter of March 9, the wife curled up by the fire in the snow and ice outside the window, and the husband put his head out of the window and looked around, asking her if she wanted to let some fresh cold air in. In the warm spring season in bloom, my wife felt that the climate was mild, so she wandered around the bedroom in her pajamas. As soon as her husband came in, she shouted hot and turned on the air conditioner at once. Why is there such a big contrast? To sum up, there are several reasons. 1, 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. 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. Modern medicine believes that the content of estrogen in women is high. The heat in the body is easily converted into fat and stored under the skin. In addition, because the metabolic rate is lower than that of men, the synthesis of heat is greater than the decomposition, so less heat is released in the body. Coupled with the fact that women generally don't like activities, they will generate less heat. Due to insufficient exercise, it often leads to poor blood circulation in the whole body or local areas, leading to chills throughout the body, especially in peripheral parts such as hands and feet. 4. Iron deficiency. The experimental results of American physiologists and nutritionists show that people with low cold tolerance have insufficient iron content in blood, which is often accompanied by the decrease of thyroid hormone in plasma. Women lose iron mainly because of menstruation. Nutritionists point out that women should consume 18 mg of iron every day, but most women can't meet this requirement, so they are afraid of cold. 5. Insufficient secretion of thyroxine. This is also an important reason why women are afraid of the cold. Thyroxine has the function of "generating heat", which can increase the basic metabolism of human body, accelerate the blood circulation of skin and increase calories. However, when thyroid hormone secretion is insufficient, it is afraid of cold because of less heat production. In addition, women's body temperature will also be affected by diet. Many women go on a diet to stay slim, so 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".

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