TS, as I tried to allude to in my other post smoking isn't solely responsible for poor health. Indeed I'm probably, definitely, fitter, cardiovascularly(!) than I was when I was in my mid twenties. It's more about lifestyle as its easy to fall into a sedentary way of life especially after your fifth consecutive early.
Do no exercise for twenty years and I'll outrun you all day long even though I smoke twenty a day.