morningstar
Cathlete
I got to thinking, what is walking at a regular pace? You know, not power walking, not at a terribly brisk pace, just plain old walking. It can't really be called cardio, because your heart rate doesn't get into an anaerobic or an aerobic zone. Could it be strength training for your legs? You are carrying your weight around on 'em, after all. I know it's low impact, low intensity exercise of some sort, but I'm just not sure what kind!