Because you consume a lot of physical strength, you need to breathe a lot of fresh air and emit a lot of carbon dioxide. Especially in the gym, if there is no good ventilation and convection device, it will lead to the continuous circulation of exhaust gas in a limited space, which is not good for exercisers doing aerobic exercise in the gym.

At the same time, the sweat and microorganisms on the surface of the human body also increase accordingly. At this time, if the air exchange is not sufficient, bacteria, viruses, pathogens and carbon dioxide in the air will accumulate, which will easily induce respiratory diseases such as pharyngitis and tracheitis.

Originally, the purpose of fitness exercise was to make the body sweat, but the indoor temperature is too low, which will make athletes sweat, leading to pore blockage and colds. Fitness needs to choose a regular and healthy fitness place. You can go to the field first to see if there is natural ventilation and whether there is a pungent smell in the air; In addition, after the gym is newly renovated, we should pay attention to whether there may be hidden dangers of pollution sources in decorative materials and furniture.