Why is foggy weather not suitable for outdoor sports?

Smog weather can easily lead to the decline of respiratory defense function and lung function. People with exercise habits should stop running and walking outdoors, and it is best not to do cardiopulmonary exercise, such as high-intensity running. Because during strenuous exercise, the breathing rhythm is accelerated and deepened, and the harmful gases inhaled into the body will be several times more than usual. Some harmful substances will become more toxic when combined with water vapor, such as sulfur dioxide becoming sulfuric acid or sulfite, chlorine hydrolyzing into hydrogen chloride or hypochlorous acid, and fluoride hydrolyzing into hydrogen fluoride. So the air pollution in foggy days is much more serious than usual. In addition, exercise in foggy days is also easy to induce cardiovascular and cerebrovascular diseases.

Will it be better to go to the park to exercise the air in foggy days?

The answer is no! When PM2.5 seriously exceeds the standard, the adsorption of plants is very weak. Only strong wind or heavy rain can blow away or wash away the smog particles in the air, but plants in parks can't.

Wouldn't it be better to exercise indoors?

The answer is no, air is flowing. When the smog is serious, the indoor PM2.5 index is not much lower than that outside. Unless you have installed a very good quality air purifier, close the doors and windows.