Do you ever go up and down the stairs for exercise? I know someone who would sort of run up and down the stairs. I do not think I could do that. What about walking up and down them? Has anyone tried that?

No, and I wouldn't do it if I weren't pretty fit. I think stairs are really hard on your heart and on your knees.

I know some people who regularly take the stairs at work, though. They say they do it because they get tired of sitting and standing all day, and want to move.