During exercise, the body generates a lot of heat, and pores and sweat glands expand, which is beneficial to heat dissipation and perspiration.

If the air conditioner is turned on, the cold wind will shrink the sweat glands on the surface of the body, which is not conducive to the body's heat dissipation. Just like after strenuous exercise, it makes sense not to take a cold bath immediately, which is extremely harmful to the body. .

Look at other countries, the fitness industry has been ahead of us for decades, and people have not installed air conditioning. It uses a ceiling fan that blows natural wind.