I'm on my 100th attempt at stopping. Had champix twice (heavy duty man), e-fag, gum, inhalator, patches. Even tried cold turkey. All shite. Champix was all sorts of fucked up. Got the lozenges the now and over the last month, cut back about 80% overall. Last week did 5 full days and had about 15 over the weekend.
All coincided with starting back at martial arts, football, weight lifting and tabata based fitness training. Feeling a bit fitter but even just a few snouts are holding back the cardio fitness. You notice a real difference when you stop completely.
If only I would stop getting injuries, I would be exercising more.