The waist is afraid of cold. Why?

In cold season, when the temperature is low, the human body will emit a lot of heat through radiation, conduction and evaporation on the skin surface. When I was 48 years old, my body didn't produce enough heat, I felt very cold, and my waist lacked twisting in winter. Because of the cold weather, people also lack action. So that the parts above the buttocks are in a "lazy state" and it is easy to feel the change of temperature. Just like I want to curl up under the covers, I always feel cold! Because. The main reasons for being afraid of cold are as follows: 1. The basal metabolism is lower than that of young adults 10 ~ 15%, and the heat production is insufficient. Second, muscle activity is an important way to increase heat production. When people are doing strenuous exercise, the heat produced by muscles is 60 times the normal amount. Muscle atrophy, weight loss, and less specific activity, so muscle activity increases less calories. 3. Thyroxine, epinephrine and adrenocortical hormone in endocrine hormones can improve metabolic rate and increase heat production. Due to the aging of endocrine glands, the production of the above hormones is reduced, so the heat production is also reduced. Fourth, when it is cold, sympathetic nerves are excited and blood vessels contract, which will also reduce the heat dissipation of the skin. Due to the aging of blood vessels, they are slow to respond to cold and insensitive to neuroregulation, which affects the regulation of body temperature, so that blood vessels can not contract effectively when they are cold, and the heat dissipation is fully reduced. In addition, some elderly people are thinner and have less subcutaneous fat, which is also one of the reasons for being afraid of cold. My suggestion is that 48 years old is old, and it is a good way to keep warm by ironing your feet and rubbing your body every day. You can walk more (on the premise of keeping warm). Thank you for your adoption!