Originally Posted by Nick Hoffman
I would be careful about using Crossfit Endurance. Last time I checked (been awhile), the creator himself has DNF'd every ultra he's participated in since. The only person I know of that's actually completed ultras on CFE does not think very highly of that style of training.
Yeah. I probably should have put in a disclaimer of some sort. I don't really know much of anything about CFE and really don't care to. It'd be up to the OP to do his own investigation.