I have been smoke free since Jan 1 st, I feel great no real cravings. My workouts have been going great. I feel cardiovascularly stronger, but the last 2 days I have been feeling alittle winded. Anybody experience this, its funny after I run on the treadmill I feel great, like I am getting enough oxygen. Maybe I am over doing it. I am in college and when some classmates go out for a smoke the stink really bothers me now, I feel good that I dont have to stand out side freezing.