I did a workout on Sunday with 2 of the Reebok steppers stacked on top of each other. I just went up and down them for 15 minutes at a really fast pace (about 90 floors). It made my lungs burn and now I'm sick just like after the race last year. I don't know what induces it. Asthma? It's just a minor cold so I'm still training and carrying on with things. Last night before Beth's 2 classes I did 7 minutes for 45 floors.
2466 + 90 + 45 = 2601 floors