Here is an example of the froggy exercise that you were wondering about Stephanie! Except we were on a bench and the ball was a dumbbell.
Also, I just can't get enough of Tracey Mallett. Right now I am really digging her pilates video. I find pilates really healing and soothing but much more dynamic than yoga. Yoga actually drives me nuts. And my knee doesn't swell afterwards! Yay!