Source: China's micro platform for science popularization

(Author: Dai Yingli, a clinician, a national secondary public nutritionist, and a nutrition lecturer of the Capital Health Nutrition and Gastronomy Association. Please indicate that the original article is reproduced from the popular science China WeChat official account)

Introduction

The winter solstice is coming. Are you afraid of the cold wind? However, it is very pleasant to stay in a warm room. The northerners can wear thin clothes and eat popsicles thanks to the heating; Southerners will also turn on air conditioners and electric blankets, so as not to rely on shaking for winter. But there are more ways to resist freezing than these. Maybe you did something wrong. After reading today's article, I hope you can get the warm feeling brought by Xiaobian. Come and feel it~

Drinking hot drinks for warmth, do you want to be healthy?

First of all, we should consider whether hot drinks bring more calories. Many hot drinks will add sugar, which contains high calories. Too many calories will cause weight gain or even obesity, and too much sugar will induce dental caries 、 osteoporosis 、 diabetes Etc;

Second, hot drinks may contain trans fatty acids, such as creamer (also called fat powder). One of the main components of fat powder is hydrogenated vegetable oil. Trans fatty acids may be produced during the hydrogenation of vegetable oil, and trans fatty acids may increase atherosclerosis and coronary heart disease The World Health Organization recommends that the trans fatty acids in the diet should be controlled as far as possible, and the maximum intake should not exceed 1% of the total energy;

Third, plastic cups or paper cups containing hot drinks may also have potential safety hazards, which may release harmful substances;

Fourth, don't drink too hot drinks to avoid causing esophagus Scald In addition, it makes people feel colder when they are wet.

The thicker the quilt, the warmer it will be?

As the temperature drops, we like to be covered with thick quilts, which makes us feel safe! However, too thick quilts can make people feel oppressive, and muscles can not be relaxed, which will cause muscle soreness and affect the quality of sleep. It is recommended to choose a soft quilt that contains and maintains more air. Because the air has low thermal conductivity, it can better conserve body heat and play a warm role. According to the indoor temperature, you can choose to cover two layers of soft thin quilts. According to the economic conditions, the materials can be soft cotton quilts, wool quilts, down quilts, porous fiber quilts, etc. with better quality. The size is relatively larger, which is comfortable and has better heat preservation effect. When using, pay attention to keeping the foot bottom and neck tight, reduce air convection inside and outside the quilt, and reduce heat loss. It is also recommended to put on pure cotton quilt cover for any kind of quilt, and often air dry it.

Loneliness can lower your body temperature. Take off your orders in the New Year!

Loneliness is a state of lack of thought or emotional intimacy. Occasionally, temporary loneliness has little impact on psychology and physiology, while long-term loneliness can cause psychological obstacles, even physical damage. Physiological research found that the function of the hypothalamus can cause emotional response, and emotional changes can also affect the hypothalamus, and the main center of temperature regulation is also in the hypothalamus. Emotional changes can cause changes in hypothalamic secretion of hormones, thus affecting temperature changes. When feeling lonely and depressed, body temperature will drop.

Men are more frost resistant than women

Generally, women are more afraid of cold than men. Scientists believe that the physiological difference between men and women is the reason why men and women feel different about cold. First, the body composition is different. The muscle content of men is usually higher than that of women. When the cold comes, muscle is an important tissue for the body to generate heat; Second, women's temperature sensors are more sensitive than men's, so they are more sensitive to cold than men's; Third, women usually exercise less than men, and the whole body or local blood circulation is not as good as men; Fourth, women will lose iron due to menstruation, while most women have to diet in order to maintain their figure. Iron intake is often insufficient, and the ability of blood to carry oxygen will also decline, resulting in slower metabolism and more "cold".

If you want warmth, wear white?

According to the principle of physics, black objects can absorb all visible light, and light objects reflect most of the visible light. Black objects get more energy than light objects, so they feel hot in the sun. However, some studies believe that white clothes can also reflect the heat from the body and help keep warm. In cold winter, whether clothes are warm or not depends most on the materials of clothes. Clothes containing and maintaining more air can better conserve body heat and play a role in keeping warm, such as down jackets, cotton padded clothes, etc. In addition, try to fasten the neckline or wear a scarf, and the cuffs and hem can keep tight or close to the body, Reduce heat loss and cold air entry caused by air convection inside and outside clothes.

Use electric blanket, be careful!

The electric blanket can heat the bed for heating purposes, but it is very important to use the electric blanket safely. First of all, when using the electric blanket, it must be ensured that the electric blanket is in an insulated state. The electric blanket should be laid flat to avoid the line breaking caused by folding get an electric shock Or fire due to electric leakage; Second, the temperature of the electric blanket should not be too high. It should be covered with a thin layer of bedding to avoid scalding the skin, but not too thick bedding to avoid local high temperature and fire; Third, heat in advance, and unplug the power plug when sleeping. Do not lie down on an electric blanket that is powered on, whether for safety or health.

Editor: Xue Yannan, Hu Qingmei