I have been dealing with this issue for awhile now (couple months). I seem to have a shortness of breath(walking up stairs, regulary fast paced walking), occasional headache, and tired alot of the time. However, I noticed no decrease in gym performance. In fact before I hurt my shoulder, I was the strongest I have ever been.
As far as my medical history goes, I have had 2 previous cases of mycoplasma and 1 case of mono. I took a pulmonary function test and passed with flying colors.
I have been training four days a week since June and thought to be in relative good shape. I played football and lacrosse my senior year.
The only cause I can think of for this SOB is:
Not eating enough, although I usually get about 3000 cals a day.
Not in as good of shape as I thought.
Side effect from mycoplasma infection.
Wonderful bonus of having allergies and being allergic to everything.
Working third shift three days a week and then switching back to a normal sleep schedule (ie sleeping at night)
If anyone has had a similar experience or has any ideas to what I should do, feel free to jump in.