> During that period of my physical prime (ages 18 to 26), I couldn't climb a flight of stairs or ride a bike without getting completely winded. Any sort of phy

> During that period of my physical prime (ages 18 to 26), I couldn't climb a flight of stairs or ride a bike without getting completely winded. Any sort of physical exertion would result in gasping, coughing up phlegm, and seeing stars. I started running when I was probably smoking 10 a day and was in the best shape of my life up to that point. If you don’t do any exercise and you smoke you’re likely to be in pretty awful shape. But you can easily smoke and be in much better shape than people who don’t exercise. The bar is very low.