1. Meet the living requirements of six solar terms in summer. The weather is hot in the six solar terms in summer, so the daily life must adapt to the characteristics of the season. Adapting to the environment can get twice the result with half the effort.
In the long summer season, the weather is getting hotter and hotter, and the human heart function is in a vigorous period. According to the law of keeping in good health according to the 24 solar terms, people should pay attention to the special maintenance of the heart in their daily life throughout the summer.
Sweat is closely related to people's health, and people's body temperature is regulated by sweat excretion. At the same time, sweat, like urine, has the function of excreting waste and regulating body fluids.
In addition, sweat can keep the skin surface acidic, effectively prevent the invasion of bacteria, and play a "barrier" role.
In the long summer, the temperature is getting higher and higher, and people are prone to sweating. In fact, sweat itself is tasteless, but it will ferment and deteriorate if it stays on skin and clothes for a long time. Therefore, after sweating, dry it in time and change clothes. Especially for babies and beriberi patients, sweat is a big enemy. If you don't wipe off eczema or macula in time, you should dry your sweat in time and put some talcum powder on your baby. Patients with beriberi can put some absorbent cotton balls between their toes to keep them ventilated and dry, which can effectively prevent beriberi.
A person who doesn't sweat is not good for his health. Exercise outdoors every day, sweat a little and take a bath, and you can spend the hot summer smoothly and healthily. It's just that if you exercise too much and sweat too much, your body's metabolism is too fast, which is harmful to your body.
After the long summer, the weather is hot, the days are long and the nights are short, and there is not enough sleep at night. After a morning's labor and work, the human body consumes a lot of physical strength and energy. Therefore, taking a nap also plays a key role in protecting health and reducing the occurrence of certain diseases.
Relevant research data show that taking a nap can prevent coronary heart disease and have a positive effect on preventing myocardial infarction. Generally speaking, an hour's sleep is appropriate.
Because the process of sleep is divided into two stages: shallow sleep and deep sleep. The light sleep stage is generally 40 ~ 70 minutes. With the deepening of sleep, people will enter a deep sleep stage. If the nap time is too long, in the deep sleep stage, the blood volume in the brain decreases, the breathing frequency slows down, and various metabolic activities in the body are relatively weakened. At this time, once you wake up, you will get up in a hurry to work or study. If the blood supply to the brain is insufficient, there will be temporary dysfunction, which will make people feel dizzy. Therefore, it is advisable to lie down 10 minutes after waking up. Some people take a sitting posture during a nap, that is, lying on the workbench or teaching platform, which is not conducive to eliminating fatigue. Because when the human body is sleeping, the muscles of the whole body relax, the blood circulation slows down, and the blood supply to the head decreases. When people wake up, they will feel dizzy, tinnitus, leg weakness, blurred vision, pale face and other symptoms of cerebral ischemia and hypoxia. Lying on the table to rest will oppress the eyeball, increase the intraocular pressure and easily induce eye diseases. In order to ensure the quality of a nap, it is not advisable to drink alcohol, coffee or strong tea during lunch, so as not to be too excited to fall asleep, and it is not advisable to fall asleep after meals. Exercise before going to bed 10 minutes. Taking a nap on your back is good for your physical and mental health.
Although taking a nap in summer is very important, it is not good for everyone.
According to the research of German medical scientists, some people are not suitable for taking a nap because their physical condition is different from that of healthy people. For example, people with low blood pressure, people with blood circulation disorders, especially those who are often dizzy because of narrowing of cerebrovascular sclerosis, are not suitable for taking a nap. Because after lunch, there is more blood in the stomach, less blood flow in the brain, and relative ischemia and hypoxia. The above two kinds of people lack the same regulatory ability as healthy people because of low blood pressure, circulatory disorder and low cerebral blood flow.
Therefore, if you take a nap after a meal, the blood circulation in the whole body is slow, and the brain will be relatively ischemic and hypoxic because the blood collects in the stomach. As a result, after waking up, my head will be dizzy and bloated, and there is no time to rest at all. If you don't take a nap and keep your daily activities, you can "mobilize" blood from other parts such as limbs to the brain through rapid blood circulation throughout the body to make up for cerebral ischemia.
People over 65 should not take a nap. Because elderly people often have arteriosclerosis, high blood viscosity caused by nutrient absorption after meals, and slow blood flow after taking a nap, these "favorable" factors provide conditions for the occurrence of stroke.
Obese people who weigh more than 20% of the standard should not take a nap. Because taking a nap after meals is a good time to store fat, and moderate exercise after meals can avoid continuing obesity. Therefore, although such people can recover their physical strength through a nap, the weight gained every day makes their bodies suffer endless troubles.
(1) Residential requirements in long summer season; The long summer is also important for the layout of the bedroom. First of all, we should thoroughly clean the living room, all the collected things (such as cotton wool, cotton-padded clothes, etc. ) It should be kept in the cupboard. If possible, adjust the furniture that affects indoor ventilation to keep enough natural wind indoors. Secondly, necessary shading measures should be taken indoors to minimize or avoid some heat sources and light; Light curtains should be hung on windows, and it is best to stick a layer of white paper (or wax paper) on the window glass to cool down. Moreover, due to the high outdoor temperature during the day, if the sun is strong, you can close the doors and windows from 9 am to 6 pm and draw the light curtain to make the indoor air flow, thus reducing the indoor temperature. There is also to strengthen the disinfection of the living room. At this time, due to the rapid proliferation of bacteria, intestinal infectious diseases such as dysentery, typhoid fever and cholera have increased and become popular, so an appropriate amount of disinfectant should be used to disinfect the room. In addition, since flies are the main media for spreading germs, eliminating flies is also an important link to prevent intestinal infectious diseases.
In the long summer season, it is necessary to adapt to the characteristics of long days and short nights in summer, adjust the work plan and pace of life in time, and slow down appropriately to leave room. Take a good nap and get enough sleep. Listen to music and think about beautiful things in your spare time, or go for a walk or outing in the park to relax as much as possible. Have no desire, be good at satisfaction and keep an optimistic mood. Pay attention to avoid impatience and anger, and strive to cultivate their own mentality of being calm and not chaotic. As the Neijing said, "It is more appropriate to regulate the breath and clear the heart, often like ice and snow in the heart, and heat also falls in the heart. You can't turn heat into heat and then heat. " Calm down.
(2) The demand of life in the small full season. In the small full season, the temperature rises obviously and the rainfall increases. The temperature will drop sharply after the rain. Therefore, in this solar term, we should pay attention to the temperature changes, add clothes after the rain, and don't catch a cold. Due to the rainy and humid weather, improper life will inevitably lead to rubella, rheumatism, sweat spots, eczema, beriberi, wet skin diseases and other diseases.
Summer is hot and humid, which is the season of frequent skin diseases. "Synopsis of the Golden Chamber: Stroke Calendar" says: "Excessive pathogenic factors make the body itch and rash." It can be seen that ancient medical scientists have long known this. The cause of this disease is nothing more than three points: first, the skin is damp and depressed, and wind-heat or wind-cold is repeated, which is related to the dampness between skin and fur; Second, due to the accumulation of heat in the stomach and intestines, common cold has a heavy feeling, so it is not allowed to leak internally or externally. Third, it is related to physique. Eating fish, shrimp, crab and other food allergies leads to disharmony between the spleen and stomach. Dampness and heat and skin depression are diseases. Rubella can occur in any part of the body, with rapid onset, and rashes of different sizes, patches or papules will suddenly appear on the skin, one after another, with different densities, accompanied by abnormal itching of the skin, which will be alleviated or aggravated with the cold and hot climate. When we understand the mechanism of diseases, we can carry out targeted prevention and treatment.
As far as sweat spots are concerned, many people's clothes are often wet, dry and wet in summer, which is a good environment for sweat spots. Unconsciously, many people will find themselves with patches of white spots, or their eyebrows seem to be thinner. At this time, they must go to see a dermatologist quickly.
As for the handsome and hot girls who love to wear tights, they must be careful of eczema and don't let the sensitive parts of the skin be dyed red by clothes. Don't take off your feet in Hong Kong, it itches to death. See a doctor as soon as possible, or it will be troublesome to turn into onychomycosis. Sweat spots, eczema and beriberi are all troublesome diseases that require patience and perseverance. There is only one principle to cure them. Find a professional dermatologist and use drugs well, so that summer will be comfortable and beautiful.
(3) The ear season is needed in daily life. In the middle and lower reaches of the Yangtze River in central China, rainfall and temperature increased, and the rainy season began. The air is very humid, the weather is extremely hot and humid, and all kinds of clothes and household appliances are prone to mildew. So this kind of weather is called "Huangmeitian" in the middle and lower reaches of the Yangtze River. In addition, the Dragon Boat Festival in China is mostly around the date of the mango seed, and there is a folk saying that "people don't eat Dragon Boat Festival brown and break their fur." This tells people that when the Dragon Boat Festival is over and the temperature is still cold, don't take off your clothes to avoid catching cold.
The health care of mango seeds should be based on the climatic characteristics of the season. In daily life, we should go to bed late and get up early, and receive proper sunlight (avoid direct sunlight and pay attention to heatstroke prevention) in order to meet the need of yang, which is conducive to the operation of qi and blood and cheer up the spirit.
In summer, the days are long and the nights are short. Taking a nap in the middle school helps to eliminate fatigue and is good for health. After the awn is planted, it is hot at noon, people are prone to sweating, and clothes should be washed and changed frequently. In order to avoid heatstroke, you should take a bath often after planting, which can make your skin loose and "yang heat" easy to vent. But it should be noted that when sweating, don't take a bath with cold water immediately. There is an old saying in China, "You can't get wet if you sweat". If you get wet when you sweat, you will get acne. If you take a medicated bath, you will achieve better fitness and disease prevention effects.
In this solar term, the elderly should not be greedy and lie in the open air, do not sweat and dry naked, and do not eat chicken, mutton and other foods that help clear away heat and reduce fire. Eat lightly and be quiet. The so-called "peace of mind is naturally cool."
In this solar term, some people in the streets and alleys began to bare their backs, mistakenly thinking that it was so cool, but it was not. As we all know, skin covers the surface of human body and has many functions, such as protection, feeling, regulating body temperature, secretion, excretion, metabolism and so on. There are millions of sweat pores on human skin, and about 1000 ml of sweat is excreted every day. Every milliliter of sweat evaporates on the skin surface, taking away 246 joules of heat. When the outside temperature exceeds 35℃, the heat dissipation of human body mainly depends on the evaporation of skin sweat, which accelerates the heat dissipation and prevents excessive temperature rise. At this time, if the back is bare, the skin will absorb external heat, and it will feel stuffy because it cannot achieve the purpose of evaporation and heat dissipation. If you wear some cotton silk clothes with good permeability, there is a thin air layer between the clothes and the skin, and the temperature of the air layer is always lower than the outside temperature, you can achieve the effect of heatstroke prevention and cooling.
Some people don't want to leave the air-conditioned room for the summer, but they don't know that air conditioning brings coolness and negative effects. Due to closed doors and windows, indoor air pollution and lack of oxygen indoors; Coupled with the constant temperature environment, its own heat generation and heat dissipation regulation function is out of balance, which will make people suffer from the so-called air conditioning disease.
Therefore, the room temperature of air-conditioned rooms in summer should be controlled between 26℃ and 28℃, the lowest temperature should not be lower than 20℃, and the temperature difference between indoor and outdoor should not exceed 8℃. Stay in an air-conditioned room for a long time and ventilate regularly. Smoking is prohibited in air-conditioned rooms. People who live and work in air-conditioned rooms for a long time should go outdoors for at least 3-4 hours every day. The elderly, the infirm and patients with hypertension had better not stay in air-conditioned rooms for a long time.
There are many mosquitoes in mangshi, which is often one of the important reasons that cause people to get sick. The way to repel mosquitoes is not only to strengthen the cleanliness of the living area, but also to improve one's daily life. For example, eating garlic can effectively repel mosquitoes, because mosquitoes don't like the garlic smell secreted by the human body; Oral vitamin B, excreted by sweat after physiological metabolism, will produce an odor that mosquitoes dare not approach. Take 2 tablets of vitamin BL orally one hour before going to bed, but don't take them in large quantities for a long time.
In addition, wearing light-colored clothes such as yellow and white can reduce mosquito bites, and wearing dark blue or brown clothes is more likely to be bitten by mosquitoes. So you should wear light clothes in summer.
Before dusk, put one or two pots of blooming jasmine, Milan or roses indoors, preferably cordate telosma. Because mosquitoes can't stand the fragrance of these flowers, they can also play an effective mosquito repellent effect.
Indoor orange lights also have mosquito repellent effect. Because mosquitoes are afraid of orange light, they should use orange light in the bedroom in summer.
(4) Life in the summer solstice season requires that after the summer solstice, most parts of China enter the midsummer. This is the worst summer in a year, and the temperature can reach 40℃. As the saying goes, "It's cloudy from summer to Sunday", which means the solar term from summer to Sunday. Although the weather is hot, Yin Qi has started to grow. Because of the growth of this yin, people are extremely fragile in this solar term and prone to various diseases. Therefore, reasonable health care is very important in this solar term.
In order to adapt to the ups and downs of yin and yang in nature, it is generally advisable to go to bed late and get up early in summer, and make use of siesta to supplement the lack of sleep at night. The old, the weak, the sick and the disabled should go to bed early and get up early, and try to keep about 7 hours of sleep every day. After getting up in the morning, do outdoor sports in the rising sun to adapt to the growth of the sun. The temperature is the highest at noon, so a proper nap can make up for the lack of sleep at night. According to scientists, taking a nap in hot summer can reduce the incidence of cerebral hemorrhage and coronary heart disease.
In the hot summer solstice season, reasonable clothing is also very important for health. From the color of clothes, it is best to wear red clothes. Because red visible light has the longest wavelength, it can absorb a lot of ultraviolet rays in the sun to protect the skin and prevent skin from aging or even cancer. Some women think that armpit hair looks bad when wearing short-sleeved shirts, so they cut it off with scissors, and some even shave it off with blades. In fact, this is wrong and harmful to health. Because it is easy to cause bacterial infection under the armpit. Metal ornaments such as earrings, necklaces and bracelets contain nickel and chromium, which can cause contact dermatitis.
After the summer solstice, the sun becomes extremely strong. Some people wear color-changing mirrors to protect their eyes, but it's not good for them. The reason why color-changing glasses change color is because the lenses of these glasses contain the color-changing substance silver halide, which changes with the intensity of light. Sunlight includes ultraviolet rays, infrared rays and visible light. After wearing the color change mirror, the pupil will be enlarged for a long time due to the weakening of visible light, which will double the amount of ultraviolet rays entering the eyes and cause harm to the eyes. Excessive ultraviolet radiation will cause corneal edema, lose its original luster and elasticity, make the pupil slow to respond to light and reduce vision; The long-term effect of ultraviolet rays will also lead to lens sclerosis and calcification, and induce cataracts. In addition, a few people who are allergic to ultraviolet rays may also cause fundus diseases such as central retinitis, which seriously damages their eyesight.
Experts pointed out that middle-aged and elderly people over 45 should not wear color-changing glasses. Over time, it is easy to induce glaucoma. People with high myopia above 600 degrees often wear color-changing glasses to deepen their myopia. So these people don't wear color-changing mirrors.
(5) Daily life in summer requires "no stones in winter and no firewood in summer." In summer, the temperature is high and the humidity is high. Wood, especially wood placed in the open air for a long time, such as chairs and stools, is exposed to rain and contains more water. The surface looks very dry, but when exposed to the sun and the temperature rises, it will emit moisture. If you sit on it for a long time, it will induce hemorrhoids, rheumatism, arthritis and other diseases. Therefore, we should be careful not to sit on the open-air wood for a long time during the summer solar term.
In addition, many people like to sleep outdoors in summer solar terms, which is not good. Because when people fall asleep, the sweat glands on their bodies still secrete sweat outward, and the whole body is in a relaxed state, and their resistance is reduced. When the temperature drops at night, the temperature difference gradually increases, which easily leads to headache, abdominal pain, joint discomfort, indigestion and diarrhea.
Generally speaking, the hottest weather in a year is coming, and Yin Qi begins to grow at this time, so we should not be too greedy for cold, but should properly let our bodies sweat to cool down and expel some toxins from our bodies, which is good for our health.
(6) Requirements of daily life in summer. In summer, the heat reaches its peak. In daily life, you should get enough sleep and not be too sleepy. You should start to fall asleep when you feel slightly tired, and don't do strenuous exercise before you fall asleep. Sleep first, then sleep, and gradually enter a deep sleep. Don't sleep outdoors, the room temperature should be suitable, neither too cold nor too hot, and there should be no convective air indoors, which is called "through flow".
When you wake up in the morning, you should wake up first, then wake up your eyes, and do some health qigong in bed, such as ironing your eyes, knocking your teeth and drumming. And then get out of bed. You can do some fitness activities outdoors in the morning, but don't do too much exercise and your body will sweat slightly. Of course, it is best to choose walking or static qigong. Don't go out at noon when the temperature is high, and the indoor temperature should not be too low.
2. Observe the schedule of six solar terms in summer. The six solar terms in summer are hot, so seasonal health care must be arranged according to your actual situation to ensure adequate sleep.
(1) In terms of time, summer is characterized by long sunshine, early dawn and late darkness. Therefore, people's daily life and schedule should be adjusted accordingly, and it is better to go to bed late and get up early. It is best to get up and go to bed regularly, so as to protect the biological clock from being worn out. Timing is the basic requirement for the internal biological clock to run on time, which can form the dynamic stereotype of the nervous system. Once the "dynamic stereotype" is formed, human behavior will be predictable and adaptive, which is the best adaptation to the environment. Summer health should have a summer schedule. Once stipulated, we must be self-disciplined and never violate it without reason. Even holidays and rest days are no exception, and only in this way can a "dynamic stereotype" be formed.
So, what is the best schedule in summer? Individuals vary greatly, but most people may go to bed at 22-23 pm and get up at 5: 30-6: 30 am; Take a nap half an hour after lunch. In addition, the time for three meals and exercise, brain use and leisure should be clear. This "timing" is especially important in summer. For example, hot weather affects people's sleep, especially makes people sleep neither deeply nor sweetly, but once they get into the habit of sleeping regularly, it is easier to eliminate the interference of the climate on sleep, and they can fall asleep soon after going to bed, quickly turn into deep sleep, and easily wake up naturally in the morning and feel very comfortable after waking up. In this way, even in hot summer, "sleep" will not be "wrong" and the body clock can run "on time".
(2) Go to bed late and get up early, and take a lunch break in summer with six solar terms. Generally speaking, it is advisable to go to bed late and get up early to adapt to the changes of yin deficiency in nature. Huangdi Neijing pointed out: "Xia San month ... lying at night and getting up early for a hundred days", which means that people have to get up early every day in summer to keep up with the fullness and exuberance of yang; Stay up late to adapt to the shortage of Yin Qi.
Six solar terms in summer, due to staying up late and getting up early, sleep is relatively insufficient. Especially for the elderly, they have the characteristics of fake sleep, so they need a lunch break. In summer, when the temperature is the highest at noon, it is easy to sweat. A little exercise will greatly reduce your physical strength and make you extremely tired. In addition, due to heat dissipation, a large amount of blood is concentrated on the body surface, and the blood supply to the brain is reduced, especially after lunch, the blood supply to the digestive tract is increased, and the blood supply to the brain is even reduced, so people are always depressed and sleepy at noon in summer. Coupled with the lack of sleep on summer nights, people need a proper nap to eliminate fatigue and conserve energy.
Taking a nap can not only supplement the necessary sleep time, rest the brain and all systems of the whole body, reserve new energy for afternoon activities, but also enhance the protective function of the body and effectively prevent heatstroke.
(3) Don't wash your hair before going to bed. There are six solar terms in summer. Shower is a popular way to cool off the heat. Many people are used to taking a bath before going to bed, then getting wet with their hair and turning on the electric fan and air conditioner. As a result, I woke up the next morning with either a headache or a cold and runny nose. In fact, the harm of shampooing before going to bed is far more than that.
Among the six solar terms in summer, people's yang is weakest at night, especially at midnight. Moreover, in summer, the human body consumes a lot and is prone to fatigue, and its ability to resist diseases naturally decreases. So washing your hair before going to bed will leave moisture on your scalp. The yang in the head condenses when it is cold. In the long run, it will lead to qi stagnation and blood stasis, and the meridians will be blocked. After washing your head and sleeping in an air-conditioned room, your head will be cold and wet, and you will get sick more easily. Sleeping until midnight, you will feel a feeling of stagflation and numbness in the local scalp, accompanied by dull pain. The next morning, I had a terrible headache. After a long time, it will lead to a disease called "scalp subcutaneous phlebitis". Physical examination can find local scalp thickening and even subcutaneous swelling. Some people think it doesn't matter when they are young and strong, but when they are middle-aged and old, they will have a headache.
So take the last shower before going to bed to avoid getting your hair wet. If you accidentally wet your hair, dry it thoroughly immediately after taking a shower. It is best not to fall asleep in front of an electric fan or air conditioner after taking a shower.
(4) Sleep to avoid the cool breeze. It's sultry in midsummer and uncomfortable at night. Some people like to enjoy the cool until late at night and even sleep on the street; Or sleeping under an electric fan and directly blowing cold, these are all bad living habits. Chinese medicine points out that "avoiding the wind like an arrow in summer", the common cold can cause many diseases, and people are often injured inadvertently. Although it is hot in summer, it is still sultry, and the wind in the middle of the night is very cold, especially under high walls, corridors, intersections and indoor corridors. In summer, the sweat gland pores of human skin are open, especially after sleeping, the body's resistance is weak, and it is extremely vulnerable to colds, especially the elderly, children, pregnant women and the infirm. After experiencing the common cold, there may be diseases such as cold, facial paralysis, joint pain, sciatica, scapulohumeral periarthritis, abdominal pain and diarrhea, which may also lay the groundwork for the onset of autumn. At this time, although he was not sick, he was in a state of "latent illness", his physique became weak, and he owed a "summer debt" to be settled after the autumn. So, the weather is hot again. There should be a limit to being cool.
In addition, you can also adopt the method of "nourishing heat with heat", that is, you can calm down and let your body adapt to the heat, but you don't feel very hot. When sleeping indoors, don't choose the wind blowing directly from the window, don't use the electric fan to blow directly with strong wind, and don't just lay a mat to sleep on the concrete floor. Before going to bed, cover your abdomen with a towel quilt. When using air conditioning, it is not advisable to adjust the temperature too low, which will lead to excessive indoor and outdoor temperature difference and cause "air conditioning disease". Generally speaking, the indoor and outdoor temperature difference is about 5℃, or adjusted to about 25℃.
Modern material civilization is also a double-edged sword, and going too far will also bring disadvantages. Although the traditional cooling is not very enjoyable, it has multiple effects. For example, the "summer fan" for the elderly is beneficial to the body and mind. Human limbs are controlled by the left and right brain, and the left brain dominates the right limb; The right brain dominates the left limb. Leisure fans are operated by left and right hands in turn, which can not only promote the flexibility of fingers, wrists and elbow joints, exercise the muscle strength of limbs, but also effectively stimulate the two hemispheres of the brain, increase its blood flow and the flexibility of cerebral vessels, thus enhancing the function of brain cells, strengthening the brain and improving intelligence, and reducing the occurrence of cerebrovascular diseases. In the evening, take a nap by shaking the fan outdoors, "light a small fan to pounce on fireflies", get together with old friends, sit around with family, and have a cup of tea to cool off the heat. When the summer heat subsides a little, you can sleep in your room, which is also beneficial to "sleep first, then sleep."
3. Clothing that meets the six solar terms in summer is scientific. Clothing that conforms to the characteristics of the six solar terms in summer is the requirement of clothing health care in the six solar terms in summer.
(1) Scientific Dressing What clothes can make people comfortable and cool in hot summer? Scientists believe that people will have different comfort under different clothing conditions. For example, when wearing thin clothes naked, it will be very comfortable to maintain the temperature at 27 ~ 30℃; Ordinary clothes, without exercise, have a temperature of 22 ~ 25℃ and a relative humidity of 50%. In summer, the temperature is about 35℃ and the relative humidity is 50%. In order to achieve human comfort, it is very necessary to choose what kind of clothes.
Someone did an experiment:
Under the condition of no wind and temperature of 35℃, a group of people are required to wear only chemical fiber summer clothes. As a result, the skin temperature increased by 65438 0.4℃, the rectal temperature increased by 0.6℃, and the body heat storage per hour was 65438 050 kJ. In the other group, the skin temperature increased by 0.7℃, the rectal temperature increased by 0.5℃, and the heat stored in the body per hour was 106 kJ. If you wear a chemical fiber summer coat outside and cotton vest shorts inside, the skin temperature will only rise by 0.2℃, and the rectal temperature will rise by 0.4℃, which will obviously alleviate people's sultry discomfort.
Therefore, experts suggest that the best collocation of clothes in hot weather is to wear chemical fiber clothes outside and cotton vest and shorts inside. Because cotton fiber has the characteristics of water absorption, it can absorb human sweat, and there is a certain gap between cotton vest shorts and chemical fiber clothes, so the water vapor content in clothes will not be saturated, sweat glands can excrete and emit heat as usual, so that people will not feel stuffy under the condition of constant humidity and reduced temperature.
In addition, the size, thinness and surface area of summer clothes are also related to heat dissipation. Generally speaking, the smaller the clothing coverage area, the faster the body temperature loss.
According to experts, when the outside temperature is lower than 35℃, heat dissipation of human body mainly depends on convection and radiation. When the human body is naked, the radiation heat dissipation is 10 times higher than when wearing clothes. Therefore, summer clothes should be short-sleeved shirts, short skirts and shorts, as loose as possible, which is more conducive to ventilation and heat dissipation, not too tight and too thin.
In addition, the color of clothing is also very important. It is generally believed that the intensity of heat absorption and reflection varies with the color of clothes. The darker the color, the stronger the heat absorption, the lighter the color, the stronger the reflectivity and the worse the heat absorption.
A recent study by Harvard University confirmed that wearing black clothes in summer is cooler than wearing white clothes. Especially wearing loose black clothes, it feels cooler.
According to relevant medical data:
The heat in the human body will be emitted by radiation, conduction, convection and evaporation. Because black clothes absorb more heat than white clothes, the absorbed heat forms convection under loose black clothes, and the flow of gas takes away sweat and part of heat from human skin. This effect of black clothes is much more obvious than that of white clothes. Although white clothes can reflect heat from the outside, they can also reflect heat from the back of the body. This is why Arabs wear black robes in the hot desert.
(2) Don't go shirtless in the scorching sun. Some people like to go shirtless and enjoy the cool in summer, thinking it's cool to go shirtless, but it's not necessarily so. When the temperature is close to or higher than the human body temperature (about 37℃), shirtless people will feel hotter rather than cooler. Because the body temperature regulation depends not only on skin evaporation, but also on skin radiation. When the outside temperature exceeds 37℃, the body temperature mainly depends on skin evaporation to dissipate heat; When the temperature continues to rise, the skin will not only be unable to dissipate heat, but also absorb heat from the external environment, making people feel more sultry. Therefore, don't go shirtless in summer.
(3) Wear sunglasses reasonably In hot summer, many people wear sunglasses to protect their eyes. But if you choose or wear it improperly, it will have bad consequences. For example, after wearing sunglasses for a period of time, some people have obvious numbness and tingling around their eyelids and noses, some people have numbness in their eyelids and cheeks, and some people have skin inflammation, sore eyes and decreased vision due to poor local blood circulation, and even lead to various eye diseases. This phenomenon is called sunglasses syndrome. This is mainly due to improper wearing of sunglasses, and the focus of the lens ring compresses the infraorbital nerve, which leads to facial neuropathy and abnormal nerve sensation.
To prevent sunglasses syndrome, we should first pay attention to the correct choice of sunglasses lens color. Sunglasses rely on colored lenses to absorb ultraviolet and infrared rays to protect their eyes. Choose colored lenses according to different situations. Generally speaking, when walking in the hot sun and working outdoors, it is best to choose gray and dark green lenses; Traffic police, welders and firefighters should choose dark green goggles because they are in strong light environment for a long time. Mountain climbers and explorers should choose dark lenses with good ultraviolet absorption performance; For water surface operators or sailors, it is best to choose sunglasses with polarized lenses because of the strong reflected light on the water surface, because polarized lenses can absorb fairly strong sunlight on the water surface, so that people's eyes can see the objects in the water clearly.
Secondly, we should pay attention to choosing sunglasses with appropriate size and weight. You should choose the right glasses frame according to your face shape. Don't use inappropriate glasses frames, let alone follow the fashion. Choose imported large-frame glasses, because the imported glasses frames are designed according to foreigners' faces, which may not be suitable for China people's faces.
Thirdly, be careful not to wear sunglasses for too long. If you have sunglasses syndrome, stop wearing glasses immediately and take some B vitamins. If the symptoms are serious, you should go to the hospital for treatment in time.
(4) Wear a cool hat when going out. Wearing a cool hat in summer is for sun protection, heat protection and soul protection. Therefore, the cool hat must have the performance of heat dissipation and ventilation.
There are many kinds of cool hats, including straw hats, cloth hats and sun hats. Each kind of cool hat has its advantages, for example, straw hat has good heat dissipation and heat insulation performance, but poor ventilation and perspiration performance; Bamboo cage cap has good heat insulation, heat dissipation and perspiration performance, but it is relatively heavy. When choosing a cool hat, as long as it can shade the sun and dissipate heat, ventilate and disperse sweat. In addition, white cloth has the greatest reflection of thermal radiation and the least absorption of radiation, so it is the most suitable material for summer cool hats.
(5) Taboos to wear underwear The summer climate is hot and the air humidity is high. The human body mainly relies on a lot of sweating to dissipate heat. When sweating a lot, most of the sweat is too late to steam.