[zimpenfish]

True but "ultramarathon" is "anything longer than a marathon" and 40-50mi/day easily disproves the "humans can't ultramarathon every day" statement.

I'd agree that it's very unlikely anyone could keep up 90mi/day for very long. If Karnazes can't ...

[goatforce5]

Here's a guy who ran one 875 ultramarathon in 5 days at the age of 61 - without sleep or otherwise resting:

http://www.badassoftheweek.com/young.html

Cliffy Young is awesome. He's a national hero in Australia.

[zimpenfish]

Yeah, he's amazing. Makes you wonder how many other heroic athletes are just bumbling about in normal life without people noticing them.