The Summer of 2019 was one of the . Abnormally high temperature caused large-scale forest fires and affect the health of many people — because you, too, felt the fatigue and headache? Fortunately, you can escape from sweltering heat, you could always turn the air conditioner or fan, but are they safe for health? Australian scientists believe that at least the fans can cause people great harm, because in certain conditions, they interfere with the body to cope with heat.
It would Seem, what could be better than a refreshing blow fan in a stuffy room? Believe me, in certain conditions, operating the fan can turn a stay in a stuffy room in a hellish ordeal. The world health organization has long insisted that when the air temperature is above 35 degrees Celsius the fans only increase the burden on the human body, aiming his hot air. It turned out that when using the fan, you should pay attention to the humidity levels.
This convinced the researchers of the University of Sydney, located in Australia. They conducted an experiment, in which asked 12 healthy men to wear shorts and to sit for two hours in hot rooms with a moist (50%) and dry (10%) air. First, in the rooms worked fan, but in the second half of the experiment switched it off. To compare the condition of people before and after the experiment, in the beginning, men have measured the body temperature, heart rate, blood pressure and perspiration rate.
Moist air useful dry, use humidifiers or set the room a basin of water!
While the fan is operating, the air temperature in rooms with moist air was 39.9 degrees, but after disabling it rose to 40.3 degrees Celsius. As a rule, the human body feels temperature differently, this index is called the "index of thermal load" and is measured at the rectal temperature. The measurements showed that the feelings of men in the rooms were 50-degree heat.
This is interesting: the Invention of the ancient Egyptians
In rooms with dry air there is quite other conditions. Temperature with a fan was 47.2 degrees, and when it is off, suddenly fell to 46.7 degrees. While men did not feel the heat, which stood in the wet rooms — they feel, the room temperature was equal to the same 46 degrees Celsius.
It would be quite logical if men from the less hot, dry room, felt better — but no, the result of the study proved to be unpredictable. Comparing the health indicators of men from two different rooms, researchers found that in a room with moist air and a fan that people feel as comfortable as possible. But men from the dry room when the fan was feeling pretty bad.
Maybe, to hell with the fans? Already have
What is the result? It turns out that the fan should not be included in premises with dry air. If the humidity in the room exceeds 50%, the fan can be safely included — body temperature will stay at acceptable levels, and the cardiovascular system will not become too tense. In a damp room, by the way, it is important to drink more water, scientists noticed that men from this room were sweating so much. And because sweating can occur dehydration.
Pinch yourself — if you are dehydrated, the fold of the skin is smoothed immediately
In August the temperature in Russia decreased significantly and, most likely, information on the fans is not relevant. But the Council of Australian scientists still need to remember and tell your friends. Also can scare your friends with the news that in 2030 the world will come .
If you are interested in news of science and technologies, subscribe to our . There you will find materials that were not published on the site!
photo sea turtle entangled in a plastic mesh today, the pollution of the Earth with plastic exceeded the worst expectations of scientists. Over 90% of seabird species are already eating plastic. This happens because at least 10% of all produced plast...
photo Sini Varghese. One of the scientists who discovered a method for the treatment of osteoporosis related musculoskeletal disorders, often lead to the fact that people in varying degrees lose the ability to properly navigate. One of the most comm...
looks like the microplastics. And it's still pretty «large» its particles In our portal we have not once told you about the related issues . But environmentalists also said that much more dangerous of the so-called microplastics (tiny almos...
In the late 60's and early 70-ies, while the continued space program,"", space Agency NASA has conducted quite a strange scientific experiments. 6 successful missions to the moon the Americans have brought to Earth a total of more...
In recent years, more interesting and largely controversial experiments conducted in China. We already told you about how Chinese scientist with the editor of CRISPR genome before they are born. Some time ago notorious surgeon to ...
All of our modern idea of the form was based on observations of other galaxies, and the distance calculations to objects who are in them. Therefore, scientists have long believed that our galaxy is similar to the other and has the...