It's hard for me to judge importance. If importance is gauged by the number of calories eliminated, that would probably be the elliptical glider. However, time spent on the elliptical feels like drudgery, and I'm always thinking about other things I'd rather be doing. I value walking or, more specifically, hiking along ATV trails, game trails, or railroad beds, as being the most valuable because I can get exercise in and enjoy doing it. Walking on sidewalks or designated walking trails is more enjoyable than the elliptical glider, but not as interesting as walking in the woods.