hard workout/breathing bronchial pain
when i was in 9th grade, for the first time in my life, someone expected me to exercise. I was in a school with a PE program and we were expected to run 440 yards. The result of this would be I would feel a soreness from breathing too hard down (I guess) in my bronchial tubes.
Last weekend I did some tough hills and really tried to keep up with the other riders, and I got that same thing. Unlike my 14 year old self who felt better the next day, over a week later and there's still some irritation there.
What is it? how can I prevent it?
Thanks