https://www.adventure-journal.com/2015/11/whats-the-farthest-anyone-has-ever-run-without-stopping/
I remember Jon Gruden bringing in body builders to show his players what can be done. The flipside of these extreme body builders is well known; they can't move their arms. We've had 240 pound David Boston who could run 4.3, but he wasn't always the most effective. Well, how about these ultra-runners?
They call them ultra-marathoners; but, when you read this, I don't think Marathon is quite the right word!
We're talking about running like fifty or hundreds of miles, and forgoing sleep? Running hundreds of miles through death valley . . . running at the south pole? Like what?