When I saw this on t.v. the other night it reminded me when I came across Dean Karnazes somehow a couple of years ago as I was training for a half marathon. This guy is something else. His nutrition is crazy and very non Paleo. His endurance and drive is relentless, and his book Ultramarathon Man is a superior read for anyone interested in "mind over matter" stuff. It's not just a "running book". I am in awe of ultra-marathoners!