I haven't been diagnosed with Fibromyalgia, but my Cardio said he wondered if I didn't have it. He said that it was an inflamation of the fibers of the muscles. Since I have Raynauds, he seemed to think that they sometimes go hand in hand. He seemed to take fibro very seriously. I also have nerve damage-bi-lateral, so I'm not sure what is causing what sometimes.
Oh, and I do know several mg'ers who have fibromyalgia as well. It seems to stand to reason the way we have to work tired muscles.

Have you ever check out Stan Way's site about his personal excercise program. One has to be very careful. I was told walking was the best for us, and has to be done under a care of a doctor.