S_T I had a co-worker that smoked, knew I was always active and stayed in shape. I was just doing stuff I enjoyed. He experienced a mild heart attack. But it was bad enough to get him to stop smoking and start walking. He dropped some weight and felt great. Funny thing was he was MAD at me for not telling him how much better he would feel if he took care of his health. I had to laugh. You know people had been telling him that his whole life, he just didn't want to hear it.

IMO There's nobody more on a fitness soapbox than an ex-smoker.
At least that was true of this guy. Probably one of the hardest things to kick. Heck I have trouble giving up a bad girl friend. Maybe cigarettes are the 2nd hardest thing to quit.  ;D