I used to smoke. I smoked yucky cigarettes: Camel Lights and Marlboro Lights. I smoked while I was an avid runner, even. I was in grad school and my office and mailbox were on the 4th floor of a bulding where the elevator was only for the handicapped. I started noticing I could not get to the top flight of stairs without wheezing (despite running 4-5 miles every day). Stopped smoking; no more wheezing.

Sadly I discovered "good" cigarettes right when I decided to quit: Exports, Dunhill,s Nat Sherman's, English Ovals...

I can still smoke an occasional cigarette but usually get light-headed and nauseous quickly...keeps me off 'em.

I do smoke pot occasionally though...