Thanks guys. I Googled Exercise Induced Asthama and did some reading on a couple different sites and I don't think it is that. It very well could be my Aerobic capacity. I have been running a lot but not pushing it very hard. I have heard that the colder weather saps your energy a lot quicker then in warmer weather which is why I was thinking the colder weather was having an effect on my Aerodic capacity. I am not well educated on biology but doesn't O2 absorbtion help your muscles sustain peak activity longer more then help your aerobic capacity or am I thinking of this in the wrong way. I would like to work on being able to huff it through these trails like the skinny guys so I can keep up.

Thanks WhaleOil let me know what they say if you remember to ask them.