This is Karo Swen, a French acrobat who specializes in pole dancing.
She is rarely right-side up.
And is essentially made entirely of muscle.
Basically, her muscles have muscles. Then there are some more muscles. She needs 'em to do things like holding her entire body weight horizontally with one hand.
This video from May, which is trending this week, features the Parisian instructor showing off some insanely impressive moves to a dubstep soundtrack.
If this isn't athleticism, I don't know what is.