In other words, whatever you do (and there are a lot of things that can be
workouts), try to do one more or five more the next time. For example, say you were climbing steps. (Sometimes they do this in a boot-camp type gym -- they'll run the group out to the parking garage and have them run up all the flights of stairs.) Anyway, say you can do one flight of stairs in a certain amount of time. The next time, you challenge yourself to do either more steps or faster times.