The reason I jog up four flights of stairs isn’t because it’s good exercise. The reason I jog up four flights of stairs is because I can’t stand being in an elevator with people. After pressing the button, the seconds tick by, and I feel a small crowd approaching me from behind.
“Did you press the button already? Okay, good–we can all ride up together! Say, would you mind breathing the same air that I just expelled from my body?”
In fact I do. And you’re ugly.
Yes, taking the stairs is good for the heart.