Brooke Ence a well known crossfit competitor.
@ 1:25 she says came back from a spinal fusion.

They come back after the injuries and keep training the exact same way.
One of the most amusing comments:
"You can definitely tell the people who say she has taken something obvious don’t know anything about working out or committing to discipline!"
Brooke trains with the natural athlete Dana Linn, so obviously she's natural too.