It’s a good question, one I have no answer for, but the details are fascinating. I dunno, I guess I could pound out the miles til I drop, certainly under those brutal circumstances. Drinking water whenever I want it, that must mean you piss on the go, mind the splash back fellas. To my mind, sleep deprivation would be the eventual killer, exhausted & mentally shred. I like to think this mass walkakillathon would have a theme song…Run DMC anyone :D