As Arielflies pointed out, we don't know if he is or isn't going through limbering up exercises with her. I would have trouble believing that Tony is incapable of assessing the situation and her movement issues, and that he isn't coming up with ways to help her improve. You can show someone something a million times, talk to them about the necessity of it a million times, but you can't make them do it! As I said before, she just seems either incapable of dance movements or for whatever reason just isn't trying very hard. Kirstie Alley was also a big woman, and you could see how much she tried and sweated at every rehearsal to get the movements right. Kirstie didn't seem a diva, but Wynonna does. I know Tony said she gives it her all at rehearsals, but he's a gentleman, and what he really might have been saying was that her "all" is exactly what we see and all she is willing to do. Kirstie had Maks, and Maks don't take no sh** from nobody!