I had never heard of this until I read another thread here on TE. I went to my doc and she prescribed an inhaler. I had to do some test to check lung capacity also, and it turns out I have a greater capacity than average. I have never been able to run. Now I can. I can't believe what a difference it makes. It is only when I exercise, so I only use it before I run. Something to be aware of: she said I needed to check my insurance because she prescribed an inhaler. It may make a difference in my coverage.

Edit: I have no allergies, so the doc thought it was unusual, but not unheard of, and when the inhaler made an immediate difference, I knew I was on to something. She said it typically happens to people who have allergies.