With regard to boot camp, and two steps at a time, which I discussed a day or so ago - it was three flights of stairs, not four.
But while we're on the topic of BC... Today we did "laps," which means that we did five sets of exercises, two exercises per set, and then a countdown of those exercises from ten down to one. So, for instance, if push ups and squats are the two grouped together, then we did ten push ups, then ten squats, then nine push ups and nine squats, etc., down to one push up and one squat. And then on to the next set of two exercises grouped together. For an hour. Do you think that doesn't sound like much - or much different than just doing exercises in general? Hmmm. Try it out and see what you think then.