The normal body temperature of the human body is 37°C, and when the ambient temperature is lower than this value, the human body will regulate the body temperature through blood circulation and metabolism to keep it constant. However, when the ambient temperature is too low or the wind speed is too high, the human body loses a lot of heat, causing the body temperature to drop, and then it feels cold.
There are four main ways in which the human body loses heat:
Radiation: The human body emits infrared rays into the surrounding air, which is an invisible form of heat. When the air temperature is lower than the human body temperature, the human body loses heat through radiation.
Convection: Air is a fluid that becomes light and rises when the air is heated, and when the air cools, it becomes heavy and falls. This creates convection, which is the flow of air. When the air around the body is heated, it rises, and the cooler air is replenished, which takes away the body's heat. The higher the wind speed and the faster the convection, the more heat the body loses.
Heat conduction: When two objects come into contact, if their temperatures are different, the transfer of heat takes place, flowing from a hot object to a cold object. This is heat conduction. When the human body comes into contact with cold objects, such as floors, chairs, tables, etc., it loses heat through heat conduction.
Evaporation: The human body excretes water through ** and breathing, and this water evaporates in the air, and evaporation requires the consumption of heat. When the humidity of the air is low, the evaporation rate of moisture increases, and the human body loses more heat through evaporation.
Understanding the way the human body loses heat, we can take corresponding measures according to different situations to reduce heat loss and increase heat production, so as to achieve the purpose of keeping warm. Here are some scientific tips for keeping warm:
Wear appropriate clothing: The function of clothing is to isolate the air from the human body and the outside world, forming an insulating layer that reduces heat loss from radiation and convection. The material, thickness, color, and wearing method of clothing can all affect the insulation effect. In general, clothes made of natural fibers such as cotton, wool, silk, etc., are warmer than those made of synthetic fibers because they absorb more air, and air is a good thermal insulation. The thickness of the clothes is also important, thick clothes can form a thicker insulation, but don't wear them too tightly, otherwise it will affect blood circulation. The color of the clothes also has a certain effect, dark clothes can absorb more sunlight, while light-colored clothes can reflect more sunlight, so in sunny places, it will be warmer to wear dark clothes, and in shady places, it will be warmer to wear light-colored clothes. The way to wear clothes is also very particular, it is generally recommended to wear multiple layers of thin clothes, rather than a thick layer of clothes, because more layers of air will be formed between the layers of clothes to increase the thermal insulation effect. Also, take care to protect your head, hands, and feet, as these areas have thin blood vessels that are susceptible to cold, and you can wear hats, gloves, and thick socks to keep you warm.
Eat the right amount of calories: Food is the main body that produces calories**, when the body consumes more calories than the calories consumed, it will form a caloric reserve and increase body temperature. However, do not overeat, as this can lead to obesity and other health problems. In general, winter foods should be dominated by foods rich in protein, fat, and carbohydrates, such as meat, dairy products, legumes, cereals, etc., which can provide sufficient caloric energy, but also strengthen immunity and fight off colds and other diseases. In addition, drink more hot or hot drinks, such as ginger tea, brown sugar water, milk, etc., which can help the body retain water, promote blood circulation, and increase body temperature.
Increase the amount of exercise: Exercise is an effective way to keep warm, because exercise can speed up metabolism, burn calories, produce heat, but also strengthen muscles and cardiopulmonary function, and improve the body's ability to resist cold. However, the intensity and duration of exercise should be moderate, not too strenuous or too long, otherwise it will lead to excessive sweating, loss of water and heat, and instead lower body temperature. Generally speaking, winter exercise should be dominated by moderate-intensity aerobic exercise, such as walking, jogging, cycling, etc., which can continuously raise body temperature, but also exercise cardiopulmonary function and increase blood oxygen levels. Before and after exercise, you should pay attention to preparing for warm-up and relaxation to avoid muscle strain and fatigue. When exercising, you should wear suitable sportswear to keep your body dry and comfortable, and change your clothes in time after exercise to prevent cold.
Use external heat sources: In addition to self-regulation, we can also use external heat sources to keep warm, such as heating, electric blankets, hot water bottles, hot water bottles, etc. These heat sources provide continuous heat to help keep the body warm. However, it is necessary to pay attention to safety when using these heat sources to avoid overheating or scalding, especially for the elderly and children, pay attention to controlling the temperature and time, and do not contact the heat source for a long time, so as not to damage ** or nerves. In addition, it is also important to maintain indoor ventilation and air quality to avoid hypoxia or carbon monoxide poisoning.
Winter cold protection is a science, and reasonable measures need to be taken according to the physiological mechanism of the human body and external environmental factors to maintain body temperature and health. This article introduces the principles and methods of winter cold protection, including wearing appropriate clothing, eating the right amount of calories, increasing the amount of exercise, and using external heat sources, etc., I hope it will help you. Of course, these methods are not set in stone, and you can also flexibly adjust and innovate according to your actual situation and preferences to find the best way to keep you warm.
Did you find the content of this article useful to you?Do you have any other tips to keep warm?Welcome to leave a message in the comment area and share your winter cold protection battle with me.
Autumn and Winter Check-in Challenge