A few months after giving birth to my daughter, I decided to get out of the house for a few hours on Saturday afternoon to attend a bellydancing class here. My back suffered from chronic pain, and I wasn't about to drown myself in painkillers the whole time.
After four sessions, I felt flexible again. Perhaps I should sign up for a new class again.
More on the art of belly dancing. Here's an article enumerating its health benefits per muscle group. Here's another article that discusses a study conducted at the University of Worcester about its health benefits.
I would like to post an article illustrating how belly dancing prevents sciatica, as soon as I find it online.