I'll look for the book and let you know. I tried doing the water aerobic classes and they were too much for me(not the pace, the pain it caused) so I stopped. Now I do a lot of leg work which actually works the abdomen and work the inner thighs. Of course, I do this in the deep end where I use a running belt so my legs are free. Then, I do 5-10 minutes of stretches. I also work my shoulders, but I can't use anything except water resistence there as it causes too much pain.

I would be interested to hear what your doctor says. I guess I'm looking for as much info/insight as possible.