hey there- i started going to the gym on a regualr basis while i was still a smoker- and let me tell you, i cant believe how much it slowed me down! i quit 2 months after i started going, because i litterally could not breathe! the difference after only 2 months after quitting was incredible! i could never do the things i do now if i was still smoking- i highly doubt i would have lost as much weight, feel as physically fit, and be able to keep up with my new, healthy lifestyle if i were still smoking- i hope you quit, and quit for good- if you think you are fit now, wait until you quit smoking! trust me on this one- i never thought i would be able to quit- and most of my motivation for quitting and getting in shape was realizing the things i am now able to do being smoke free- good luck to you, and i hope you succeed!
-Lisa