I noticed the difference in breathing at the end of day 1

Last week I ran on the treadmill continously (yep, without stopping) at 10km/hr for 3min ... doesnt sound like much, and it probably isnt ... but i was stoked. I then upped it to 11km/hr but conked out after 2min. Anyway Keep up the good work one and ALL !!!
I've been slack with my exercise a tad of late, but I think that is due to remembering why, when I quit for 3months last time ... I took it back up - cos I'd rather smoke than be fat, GrrrR.
Tbh, one thing is keeping me focused on pursuing the dream of being a NonSmoker . . . and that is the ability to breathe.
Funny, in the pursuit of trying to be a nonsmoker, I may kill myself with the amount of exercise required, so that I dont become overweight lmao!
And no, I havent had a ciggi since 15Jul10.