The study below was a collaborative effort between fibromyalgia researchers in both Spain and Portugal. The results were extracted form the journal, Arthritis Research & Therapy.
Essentially, they put these people into a Masters Swimming program from the sound of it... From the Environmental Illness Report:
"... Narcís Gusi and Pablo Tomas-Carus, both experts in sports science, conducted a randomized controlled trial which involved a thirty-three women with fibromyalgia. Their aim was to find an alternative aporoach to the treatment of the disabling condition based on their knowledge of sports science. patients to find an alternative approach.
The participants were split into two groups with seventeen then taking part in a swimming pool exercise program with the remaining sixteen living as they normally would.
The supervised training exercises took place in a heated swimming pool and each session lasted for an hour. During each session the women stood in waist-high water while an instructor guided them through a warm-up, strength exercises, aerobics, and a cool-down period. The participants attended the pool for these exercise sessions three times per week over a period of 8 months. ..."[Link]
So, if you know any fibromyalgia suffers, hook them up with swim coach.