I'm looking for a balance ball DVD that has, in the group of demonstrators, a person doing the exercises in a modified way. The DVD that came with my balance ball has a group of three people doing the exercises - and they all do the full exercise. Obviously, without the ball, I could modify without help. With the ball - I'm concerned that if I modify it, I will do so incorrectly and will get no benefit or will hurt myself.

I'm in no shape to do the full-blown leg or ab exercises. I could probably do the leg exercises about 50%. The abs - I'd be lucky to do them 10-15% of the way.

Thanks for any guidance!