Stairs workout

Tried using the building’s stairs for some quick cardio exercise. I jogged? walked quickly? ran slowly? from the 2nd floor up to the roof (nominal 5th floor), then down to the lobby, then back up to the 2nd. I could probably have gone another floor or two if I’d had to to save my life or something.

So that’s up 3 floors, down 4, then up 1.