I've had fibro for 27 years and not lost any muscle tone yet, so I'd suggest doing some research on this before panicking. All I've seen is that since fibro users tend to AVOID using major muscle groups because they hurt so they tend to lose tone--thus the suggestion for exercise from most doctors (plus our own endorphines are the BEST pain killer for fibro). I think he probably just could have stated it better.

Yes. I am taking physical therapy to strengthen my ankles. My hands have also weakened. When we tried electro stimulation therapy on my legs, my right leg felt no stimulation, even when the electricity was cranked all the way up. That leg appears thinner than the other.
I use a scooter anytime I leave the house. If I walk, I will have severe cramping when I get home.
Epsom salts baths are my answer to cramping. 15 to 20 minutes in the tub works wonders. Sometimes I do this twice a day.

yes, I have to take potassium, vitamin B, C, D and still have pain, but they do help

There are SO many symptoms, that there are too many to count. Then you add other diseases into the mix which are exacerbated by Fibro or the Fibro is exacerbated by them. Before and since I was diagnosed with Fibro, I was and have been diagnosed with several other things.... ie hypothyroidism, IBS, chronic cluster migraines, Sjogrens syndrome, ulnar neuropothy, carpal tunnel, and the list goes on.

Hope your feeling better today!