Women who were overweight had a relative risk of 1.70 for developing fibromyalgia (95% CI 1.35 to 2.13) compared with women of normal weight, according to Paul J. Mork, DPhil, and colleagues from the Norwegian University of Science and Technology in Trondheim.
Moreover, the relative risk for women who were overweight and did not engage in leisure time physical activity was 2.09 (95% CI 1.36 to 3.21), the researchers reported in the May issue of Arthritis Care & Research.
Studies have shown lower levels of physical fitness among patients with fibromyalgia compared with healthy controls.
In addition, high body mass index -- which may reflect poor physical fitness -- has been linked with a lower pain threshold among patients with fibromyalgia.
http://www.medpagetoday.com/Rheumatology/Fibromyalgia/19814