Comparative efficacy of various exercise therapies for chronic fatigue syndrome: A systematic review and network meta-analysis.
Liao, Zhongxin, Zhao, Suhong, Fang, Sitong et al. · iScience · 2025 · DOI
Quick Summary
Researchers reviewed 25 studies testing different types of exercise for ME/CFS to see which worked best. Graded exercise therapy (GET)—where activity is slowly increased over time—showed the most short-term improvement in fatigue, mood, and anxiety compared to no treatment. Other exercises like yoga, qigong, and strength training showed smaller benefits that may not be meaningful for most patients.
Why It Matters
This comprehensive comparison helps patients and clinicians understand which exercise approaches have evidence for symptom improvement in ME/CFS and which do not. The finding that most alternative exercises fall short of clinically meaningful benefits challenges common recommendations and highlights that GET, despite controversy, has the most robust short-term data—information critical for informed treatment decision-making.
Observed Findings
Graded exercise therapy reduced fatigue scores by approximately 6.93 points (moderate certainty) compared to waitlist control at end of treatment
GET showed reductions in depression (MD: -5.27) and anxiety (MD: -2.88) with low certainty evidence
Yoga, Qigong, strength training, and running demonstrated modest benefits that did not exceed minimally important difference thresholds
Effects of GET showed partial maintenance at follow-up assessment periods
25 randomized controlled trials met inclusion criteria, with 20 (n=2,831) analyzable via network meta-analysis
Inferred Conclusions
Graded exercise therapy offers the strongest short-term evidence for symptom improvement in CFS compared to other exercise modalities and waitlist
Alternative exercise approaches (yoga, qigong, resistance training) lack sufficient evidence of clinically meaningful benefit in this patient population
The short-term efficacy of GET does not resolve broader clinical and safety controversies surrounding its use in ME/CFS
Future research must prioritize high-quality trial design to clarify optimal exercise approaches and identify patient subgroups most likely to benefit
Remaining Questions
How do exercise interventions affect post-exertional malaise and long-term functioning beyond short-term symptom measures?
What This Study Does Not Prove
This meta-analysis does not establish whether GET is safe or appropriate for all ME/CFS patients, particularly those with post-exertional malaise (PEM), as it examines symptom outcomes without fully addressing harm or patient heterogeneity. The short-term focus does not clarify long-term sustainability or whether benefits persist beyond the follow-up periods measured. Network meta-analysis compares efficacy within published trials but cannot prove causation or establish mechanisms.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →