Evaluation of Balance and Core Endurance in Patients with Fibromyalgia Syndrome

Abstract

Introduction: This study was designed to examine disparities in core endurance and balance among patients with fibromyalgia syndrome (FMS) relative to healthy controls. Methods: A case-control design was used, including 44 FMS patients and 44 matched controls. Assessments included the McGill tests for core endurance; the HUR BTG4 Balance Master System and the Berg Balance Scale (BBS) for balance; and the Fibromyalgia Impact Questionnaire for functional status. Results: There were no significant demographic differences between the groups (p>0.05). However, FMS patients exhibited significantly lower scores on the BBS (p=0.017), trunk extension (p<0.001), and prone bridge tests (p<0.001) than controls. Significant impairments were observed in all static and dynamic balance parameters, including SP-COG-EO area (p<0.001) and USP-COG-EC velocity (p<0.001). A moderate negative correlation was found between the right-side bridge test and velocity during the eyes-closed balance test (r:-0.309, p=0.042). Conclusion: Core endurance and balance are significantly impaired in patients with FMS. While individual deficits exist, the lack of strong correlation between most endurance and balance measures suggests these impairments may stem from independent pathophysiological mechanisms in FMS.