Clinical relevance of resistance training in women with fibromyalgia: A systematic review and meta-analysis

Abstract

Background and Objective: There has been an increase in the number of papers assessing the effects of resistance training (RT) in patients with fibromyalgia. Therefore, the objective of our study was to evaluate the clinical relevance and effectiveness of RT for pain intensity, functionality and severity of the disease specifically in women with fibromyalgia through a systematic review with meta-analysis. Databases and Data Treatment: Seven databases were searched. Randomized controlled trials conducted in women over 18 years of age with fibromyalgia were included. Fifteen trials were included in the systematic review and 14 of these studies were included in the three meta-analyses performed. Study quality assessment was performed using the PEDro scale. In addition, the GRADE recommendations were used. Results: The global meta-analysis revealed statistically significant differences in the RT group versus the control group on pain intensity (SMD = −0.49; 95% CI [−0.74, −0.24], p = 0.0001), functionality (SMD = −0.23; 95% CI [0.01, 0.45], p = 0.04) and on severity of the disease (SMD = −0.58; 95% CI [−0.90, −0.26], p = 0.0005). Clinically relevant improvements in the overall outcome of the three variables studied in favour of RT were obtained. Conclusions: RT is effective to improve pain intensity, functionality and severity of the disease in women with fibromyalgia. These improvements are clinically relevant. More clinical trials of RT are needed in women with fibromyalgia to support our results due to the low strength of evidence. Significance: This systematic review with meta-analysis provides evidence that RT produces clinically relevant improvements in women with fibromyalgia. The absence of immediate benefit is often a major barrier to adherence to treatment. Our findings will help clinicians to empower patients that if they continue treatment, they will achieve improvement in their disease.