The effect of physical exercise on fatigue in systemic lupus erythematosus: a systematic review.

Objective: Fatigue is a prominent and disabling manifestation that impairs the quality of life of Systemic Lupus Erythematosus (SLE) patients both physically and mentally. The majority of SLE patients reports fatigue as an unmet need. Physical exercise could help SLE patients to reduce fatigue and improve quality of life.

Methods: A systematic review was conducted to analyse the effectiveness of physical exercise interventions to reduce fatigue in SLE patients. PubMed, EMBASE, Web of Science: Core Collection, the Cochrane Library, CINAHL via EBSCO, and PEDro were searched (March 2021 to October 2021). Studies were included if they fulfilled prespecified criteria and were assessed for quality using the PEDro risk of bias tool.

Results: A total of 17 studies (11 RCTs, 3 non-RCTs, 2 one-group pretest-posttest designs, and 1 cross-sectional study) were included in this review. They compared exercise treatment with standard care, alternative treatment, or a different type of exercise. Most of the included studies reported significant improvement in fatigue after exercise therapy. However, study heterogeneity is an important methodological limitation. Exercise interventions did not cause disease flare-ups in patients with low to moderate disease activity.

Conclusion: Studies are heterogeneous, precluding firm conclusions. In general, 10 out of 17 studies showed statistically significant but rarely clinically relevant improvement in fatigue after exercise treatment. However, results were not always consistent across different instruments used to assess fatigue. More multi-centred randomised controlled trials are needed to find the best type of physical activity that is both safe and effective for SLE patients.