How much fine dust is good for exercising?

fine-dust exercise

The weather got warmer, so I'm thinking of riding a bicycle. I rode it for about a day yesterday, and the fine dust got better, so I thought I was in my 80s, but I still feel a sore throat

I don't know if it's because of my mood or the actual effect of fine dust.

I didn't wear a mask.

How much fine dust is good to exercise without a mask?

290 2018-04-04 Gentleman

A. 1

80 may not be very high by the standards of the fortress, but by WHO standards, it's very bad

Gentleman 7 years ago 0

A. 2

If you want to work out well, it'll be better if you do it at home

Gentleman 7 years ago 0

A. 3

I think it should be at least 50

Gentleman 7 years ago 0

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