It will make you feel refreshed! .... Someone said that carbon dioxide is denser than air, so unless you stir it up, it will settle to the floor. Therefore, I thought that the carbon dioxide in the body would accumulate in the lower abdomen. This hypothesis is why I do handstands. Everyone knows you can take in a lot of air by taking a deep breath or belly breath, but I doubt it. What are the disadvantages of a concept without a pair concept? A concept without a counter concept should not be trusted. Because it means not being criticized by anything. For example, I wonder what is the opposite concept of the concept of safety. It is basically impossible to give a single concrete example of what threatens the concept of security in the abstract. Because safety means that nothing happens and the status quo doesn’t change. Because the carbon dioxide is pulled by gravity and stays, right? If that’s true, it’s hard to believe that deep breathi...