An old joke:

Do you smoke after sex? I don't know, I never looked.

My father was a two-pack a day man. He developed angina around age 55. Had a stroke at 59, and died of congestive heart failure at 64. The doctor told my mother it was all related to smoking.

Good Luck Geoff. Replace smoking with walking and then jogging. You put me on to My Tracks, so as Andrew Dufrane said, "Get busy living, or get busy dying."