A 15-week Swedish study found that “person centered” progressive resistance exercise improved general fatigue, physical fatigue, sleep quality and mental fatigue in women with fibromyalgia. Working fewer hours and getting increased sleep also improved fatigue. A “person-centered approach” was defined by the study authors as “active patient involvement in planning the treatment to enhance the patient’s ability to manage health problems.” Study participants worked out twice a week for 15 weeks in physiotherapy clinics, doing 50 minutes of resistance exercise targeting large muscle groups in the trunk and all four extremities.