I have noticed that, I have shortness of breath and I can't breath properly through nose for a long time or during running. My breaths are heavy and some of my friends pointed that my breath is heavy and they can hear and feel my breath. Is there any condition or serious problems. Kindly guide me. I don't smoke or drink neither there was any problem or allergy in the past, and I was always active in day to day life and sports and there was no problem.