I am a 38 year old male, who is in otherwise excellent condition. I am a long distance runner, usually run 40 - 60 miles a week. In late may, I started having a shortness of breath, at one point I could not even run 2 miles.

I have been to my family physician, allergy specailist, and a pulmanry specialist, and an ENT. All of my lung function tests, came back normal but the days I had those tests I felt better than others. I am very alegeric to hay fever and some molds.

I did notice when I am not running the a/c in the house I feel much better but not 100%. Also, the ENT mentioned I may need sinus surgery because some of my nasal passage ways are blocked.

Can all of these different issues becausing this problem? If I get the sinus surgery would I see a significant increase in my breathing?

I am not sure what is causing this, but it is getting very frustrating.

Thanks!