Why are you guys using words like "average" or "typical," or even just looking to athletes and the like? Characters like Batman are outliers. He may not have any superpowers, but there is something extraordinary about him that lets him do what he does. Hell, even the people Batman himself has recruited and trained quickly get used up/retire/slow down significantly after only a few years of trying to keep up, and they're pretty big outliers, too.
I have no idea what an outlier is, and I'm pretty sure I've never met one. Are there such actual people who have extraordinary resistance to injury?
And if you're pulling them not only out of their settings but also the suspension of disbelief that comes with them, well, what's the point in that? You could do that with any superhero. "If Superman were in the real world where he didn't have any superpowers, but he tried to stop a train? How many nanoseconds would he survive after the initial impact?"
???
Heh? That's not at ALL what I'm asking. I specifically said to discount heroes with superpowers and only consider superheroes that are normal humans. Like someone said upthread, that mostly narrows us down to Batman and Daredevil, but I'm also thinking what if some poor schmoe in real life decides to give it a try.
What's the point? This is the frickin' internet. What's the point of HALF the things we talk about here? Why pick on MY question?