Sauna, also known as Finnish bath, refers to the process of physical therapy with steam in a closed room. Usually, the indoor temperature of sauna can reach above 60℃. Sauna originated in Finland and has a history of more than 2000 years. By using the cold and hot stimulation of repeated dry steaming and water washing, blood vessels can be repeatedly expanded and contracted, which can enhance the elasticity of blood vessels and prevent arteriosclerosis.
Related origin
There are different opinions about the origin of sauna, but the consistent view is that it originated in ancient Rome. The ancient Romans used charcoal and volcanic rocks to gain heat for fitness, which is the embryonic form of modern sauna.
Sauna is Finnish, which means "a cabin without windows". I'm afraid this name has something to do with the origin of sauna. At first, there were no windows or even chimneys in the hut, and the smoke blackened the room. Therefore, the sauna at that time was called "smoke sauna".
Baidu encyclopedia-sauna (Chinese word)?