Surprisingly there is lot to obsess about in Running for such a simple activity. For example, each feet has 26 bones, 30 joints and 100 muscles, tendons and ligaments (https://www.arthritis.org/health-wellness/about-arthritis/where-it-hurts/anatomy-of-the-foot). And of course you can obsess about each one of them. This is really impressive that just the two feet…