Oh, about being hard on their bodies...

failed to address that... and the truth is: I don't know. They recover quickly at that age... like almost spooky fast. Normal wear and tear, as bad as it is, I think they can spring back from in what would seem like 'overnight' to us old guys. The more serious injuries they'd spring back from more quickly than most as well... BUT... yeah, I think that would be a big problem.