Thanks for the link too. He certainly is naturally adapted for ultra running, obviously strong legs and low body weight. It always makes me wonder how some people find the time to to these kind of things, again and again and find time to work as well. Their circumstances are cleary different to the average working person. I know of a youngish guy who travels throughout Europe and elswhere during the Summer months taking part in ultra's every week, sometimes during the week as well. He is working in IT, and does online coaching, so can do what he needs to do from anywhere he can get internet access.