WOW! Good for you! I am only 41 and can't even say the word *cartwheel* without my back hurting. While I don't know of any adult programs, I often wished our gym would have something for us moms to do since we were there 3 times a week anyway. For me though it would have to be something mild like Pilates for beginners, LOL
Hope you find something, if not, maybe you could start up something on your own!