If you are out of breath it could be many things. Heart
Disease, Heart failure, COPD, Pneumonia
and probaly a host of others. It also could
and more likely is poor conditioning. My suggestion to you. As being out of breath or short of breath can be a serious situation, I would go to a qualified Physician and have this evaluated asap. If it is real bad, you might consider going to your nearest emergency room. Hope this helps you.