How the heat affects a person.

People say that the heat of the bones does not break, but in fact it turns out that the hot weather can be a situation for a person close to extreme. Heat affects all processes of the body, and it is important to know how to minimize this effect.

Temperature records

The effect of heat on people has always been interested. During the experiments it was found that a person is able to withstand a temperature of 71°C for one hour. 49 minutes-to withstand a temperature of 82°C, 33 minutes — a temperature of 93°C and only 26 minutes — a temperature of 104°C. for the purity of the experiment, measurements were carried out in dry air.

The maximum temperature at which a person can breathe smoothly is 116°C.

However, in history there were cases when people could withstand higher temperatures. Thus, in 1764, the French physician Tillet provided the Paris Academy of Sciences with data on a woman who was in the oven at 132°C for 12 minutes.

In 1828, a 14-minute stay of a man in an oven with a temperature of 170°C was documented, and in 1958 in Belgium a man was in a thermal chamber with a temperature of 200°C.

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In cotton clothes, a person can withstand a rise in temperature to 270°C, without clothes-210°C.
In the water environment, human resistance to high-temperature experiments is lower. In Turkey, one man dipped his head into a boiler with water heated to 70°C.

The heat and the heart

Doctors note that the most serious blow during the heat is exposed to the cardiovascular system. At elevated temperatures, the heart begins to work more intensively, pulse quickens, blood vessels expand, and blood pressure often drops.

In the heat the body loses a lot of liquid, and with it-mineral salts. At the same time, potassium and magnesium, the deficit of which is felt particularly acute in the heat, are necessary for the heart and heart rate.

Another consequence of dehydration is blood thickening. In tandem with low blood pressure, this increases the risk of blood clots.

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Heavy sweating

The first reaction of the body to heat - active sweating. This is a way of thermoregulation. In this regard, we were lucky - the animals of the sweat glands are poorly developed and thermoregulation they occur mainly through the mouth.

The intensity of cooling the body in heat depends on the volume and rate of evaporation of sweat from the body surface.

In addition, through the sebaceous glands also secreted fat, which also contributes to more efficient sweating.

Dehydration, lack of water-not the main problem. The main thing that together with the body then loses salt and minerals. Their deficiency directly affects the cardiovascular system and the functionality of the brain.

Dehydration in the heat depends on the level of human activity. With intensive work or sports, water loss can be 5-6 liters. When walking in the sun sweating is increased twice, during the run - in 4-6 times.

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Not only high temperature, but also humidity has a serious effect on the health. The temperature is 40°C and the relative humidity is 30% perceived by the body as well as the temperature is 30°C and the humidity is 80%.

Heat and level of aggression

Heat affects not only the physiology of a person, but also his psyche. And has a negative effect. Doctor of psychology David Myers studied the crime rate in six States of the United States and established the following trend: the temperature increase by only two degrees will seriously increase the aggression in society.

According to Meyers, every year cases of aggressive behavior of citizens will become 50 000 more.

The most critical and provoking on aggression temperatures, according to Meyers, 27-30 degrees. If the temperature is less than 27°C, the person copes with it successfully; if the temperature is above 30°C and approaching 40°C, then not before aggression. The body in this hell spends a lot of effort to maintain homeostasis (constancy of the internal environment) and the person turns on "energy-saving mode".

What to do?

How to protect yourself from the heat and keep not only health, but also efficiency? The most important thing is to avoid a long stay in the open sun. If you can hide in the shadows - hide.

In the heat you need to wear the right clothes. Ideal to it was loose fitting and covered the entire body (think of the robes of the Bedouins).

Shorts and a t - shirt are fine, of course, but for a long stay in the sun this bow is not suitable. Large open areas of the body can provoke not only heat, but also sunstroke, you can also get a sunburn.

Especially in the heat you need to protect your head. Panama hats and caps of light colors will be just right. Is the same - a turban or scarves like a Bedouin.

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Of course, you have to drink a lot. And not necessarily water. Good save from dehydration unsweetened juices, decoctions of wild rose, Linden or thyme, water with lemon, compotes. Since then out salt, well quench your thirst in the heat of non-carbonated mineral water and isotonic, which will restore the water-salt balance. Alcohol should be avoided. It will only increase dehydration.

During the heat, it is also recommended to avoid Smoking, as it worsens the cardiovascular function, prevents the supply of oxygen to the blood and thickens it.

Can help point cryotherapy-applying cold objects to the lymph nodes, hands and behind the ears.

In the heat you need to avoid heavy food, do not eat fried, fatty meat, salty food (salt delays water in the body and worsens heat). Eat fresh fruits, vegetables, little by little, but often, 5-6 times a day.