...that there is a sport in which competitors are timed as they run up the stairs in some of the world's tallest buildings?
How would you have done at that when you were at your most fit?
Seems pretty brutal. Not only would the exertion be punishing but you have to be smart about pace. I have read that once you lose your breath there is no getting it back while running up stairs -- no matter what kind of shape you're in.