No exact way of testing athleticism, but let's look few things:
Does she squat, deadlift, clean, bench press etc. more compared to her bodyweight than anyone else?
Does she jump higher, run faster or run longer than anyone else?
Can she jump rope better than anyone else?
Can she do taekwondo, karate or capoeira movements like no-one else?
Does she have fastest hands in the game?
Does she have the best footwork around?
Can she go 5 rounds non-stop like Cain?
Does she have fastest double leg, most explosive suplex or best low single?
Does she have balance like like Machida or GSP?
Can she react faster than Anderson?
I don't think she has anything that makes her super athletic. She's really athletic for a woman but like we know, in physical abilities women are incomparable to men. And get away with that "promoter's gonna promote". Yeah, promote without BS. I care even less about Ronda because of this bs.