The 28th was a hot day in central Tokyo for four consecutive days, and it was extremely hot in various places.
Immediately after the rainy season, many people are not accustomed to the heat, which increases the risk of heat stroke.
Experts say that cooling the "palm" etc. is effective as one of the measures against heat stroke.
Blood vessels that play a role in controlling body temperature in the palm of your hand
Kozo Hirata, an emeritus professor at Kobe Women's University, who is familiar with the mechanism of body temperature regulation, said, "Although the palms of both hands are only 5% of the whole body, AVA = arteriovenous anastomosis (Dojomyakufungo), the role of body temperature regulation. There is a blood vessel that is responsible for the heat, and hot blood is flowed through it to release heat from the palm. Even if the palm is exposed to the air, the heat will escape, but by contacting it with a cold object, the body temperature will be accelerated. It has the effect of making it easier to lower. "
According to Professor Emeritus Hirata, the amount of blood flowing through the AVA on the palms and soles of the feet is about 10,000 times higher than that of blood flowing through the capillaries. Is possible.
Cooling the palm during practice Measures against heat stroke
At the baseball club of Kyoto University of Advanced Science and Technology in Ukyo-ku, Kyoto City, as a measure against heat stroke during practice, a special ice pack developed by an Osaka company that keeps the cooling effect for about 1 to 2 hours is held in hand. We are starting a trial to lower the body temperature.
First, the students grabbed the ice pack to cool their palms before they started practicing, and then diligently cooled their palms during breaks such as running.
It is expected to have the effect of lowering the body temperature and lowering the risk of heat stroke by performing it in combination with hydration.
A member of the baseball club said, "I was able to exercise comfortably in a cool state."
Kazuhiro Kajita, coach of the baseball club of Kyoto University of Advanced Science and Technology, said, "It's good to be able to easily lower the body temperature in a short time. I think they will give it to me. "
Be careful not to overcool
According to Professor Emeritus Hirata of Kobe Women's University, when cooling the palm of your hand, it is better to use something that is about 15 degrees Celsius, not something that is too cold below 10 degrees Celsius, such as ice.
If the AVA is cooled too much, the blood vessels that have dilated to allow a lot of blood to flow may contract, making it difficult to dissipate heat.
Professor Emeritus Hirata said, "Just by storing tap water in a washbasin and putting your hands and feet in it, you can lower your body temperature sufficiently and effectively."
“The reaction of the body is not catching up as much as midsummer”
Professor Emeritus Hirata said, "In early June and early July, even though it is already very hot," a lot of blood is shed. Yes, let's sweat a lot. ”The reaction of the body, which is called heat acclimatization, is not catching up as much as in midsummer, so we need to be careful.”
On top of that, he says, "I want you to take measures as soon as possible, such as actively using the air conditioner or actively hydrating, knowing that heat acclimatization has not caught up."
(Osaka Broadcasting Station coverage group)