Because of the conditional twitching, there was a layer of not too thick carpet on the concrete floor, a layer of mats on the carpet and a bed sheet, and I did not know that it was good for the body, I am living on the 26th floor of the elevator apartment more
Sleep on the ground, mainly air is not good, because the ground on the heavier turbidity, long time and interest is not conducive to good health; followed by the temperature should not be mastered, the human spine temperature is too low, will cause a variety of diseases. Now Japan and South Korea are very little to sleep on the ground.
not good. Sleep on the ground, not ventilated, because the body has moisture, long mat will be damp and easy to breed bacteria, have an impact on health.
The warmth of the room is the flow of heat through the gas flow, from the perspective of fluid mechanics, the room air flow from the bottom up, so the ground is cold air flow where the direct sleep on the ground is not good, Tube is also the cold air flow of the fastest place, easy to cause harm to the body, I have had this experience, accidentally, rheumatism and seizures of the defensive flames, It is safe to have a height of about 200 mm or so.
