Great ass. Good camera angle. Maria always weirds me out with her absence of hips, but this is an excellent shot of her. She has a nice butt, I just always feel sorry for her I see she has no waist or hip action going on.
Could also be the high heels that pushes her ass-ets up and giving it such a nice appearance...or it could be all the training to look "fit" that actually does give her an overall tone...yeah one of those or all of those I think.