How much haze makes it impossible to attend physical education classes

Physical education classes cannot be held when the air quality index reaches above 200.

When the heavy pollution weather warning response level reaches a blue warning, that is, when the air quality index (AQI) in the area reaches above 200, the warning level IV is activated, and primary and secondary schools and kindergartens stop physical education classes and other outdoor activities. People with illnesses, lung diseases, and students with special physiques should stay indoors.

When the heavy pollution weather warning response level reaches an orange warning, that is, when the air quality index in the area reaches above 400, the warning level II will be activated. Schools and kindergartens will stop all outdoor activities and open-air sports competitions. School-level, Physical examinations and other outdoor group activities organized at the district, county and municipal levels will be postponed and necessary protective measures will be taken.

Air Quality Index:

The Air Pollution Index (API) currently adopted in our country is divided into five levels. The API value is less than or equal to 50, indicating that the air quality is excellent, which is equivalent to reaching the national air quality level. The first-level quality standard meets the air quality requirements of nature reserves, scenic spots and other areas requiring special protection. The API value is greater than 50 and less than or equal to 100, indicating that the air quality is good, which is equivalent to reaching the second-level national air quality standard.

The API value is greater than 100 and less than or equal to 200, indicating that the air quality is lightly polluted, which is equivalent to meeting the national air quality level three standards; long-term exposure, the symptoms of susceptible people will be slightly aggravated, and healthy people will be irritated. symptom. An API value greater than 200 indicates that the air quality is poor and exceeds the national air quality level three standards. After a certain period of exposure, it will be more harmful to the human body.