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The efficacy of exercise in patients with myalgic encephalomyelitis/chronic fatigue syndrome: A systematic review and meta-analysis. — ME/CFS Atlas

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The efficacy of exercise in patients with myalgic encephalomyelitis/chronic fatigue syndrome: A systematic review and meta-analysis.

Zhao, Liping, Gou, Bo, Zhang, Meng · Journal of psychosomatic research · 2026 · DOI

Quick Summary

A review of 17 studies involving 1,944 ME/CFS patients found that exercise interventions were associated with reported improvements in fatigue, sleep quality, quality of life, and mood symptoms. However, exercise did not show significant improvements in heart/lung function or ability to perform daily activities. Importantly, the studies did not report differences in safety concerns between exercise and control groups, though individual responses to exercise vary widely in ME/CFS.

Why It Matters

This systematic review synthesises the largest available evidence base on exercise in ME/CFS and identifies domains where exercise is associated with symptom improvement versus where effects remain absent or unclear. For patients and clinicians, the finding that exercise was not associated with improvements in cardiopulmonary or functional capacity—despite fatigue reduction—highlights that ME/CFS exercise response may differ from exercise effects in other conditions, and underscores the importance of individualised approaches.

Observed Findings

Exercise interventions were associated with improvements in fatigue (SMD=0.85, 16 RCTs, n=1,673).
Exercise was associated with improvements in sleep quality (SMD=0.42, 5 RCTs, n=806).
Exercise was associated with improvements in quality of life (SMD=0.99, 11 RCTs, n=1,171).
Exercise was associated with improvements in depression symptoms (SMD=0.56, 9 RCTs, n=1,279).
Exercise showed no significant association with cardiopulmonary function (SMD=0.13, 95% CI −0.11 to 0.43, 3 RCTs, n=150) or functional capacity (SMD=0.09, 95% CI −0.21 to 0.38, 4 RCTs, n=459).
No significant differences in acceptability or adverse events were observed between exercise and comparator groups.

Inferred Conclusions

The authors interpret these findings as indicating that exercise is an effective strategy for symptom management in ME/CFS, particularly for fatigue and emotional wellbeing, but not for objective measures of cardiopulmonary or functional capacity.
The authors propose that intervention characteristics (length, frequency, session duration) and medication use may moderate treatment response, suggesting heterogeneous effects across patient subgroups.
The authors conclude that exercise should be delivered with strict adherence to individual energy limits to prevent harm—a recommendation that frames exercise as requiring personalised dosing rather than standardised protocols.

What This Study Does Not Prove

This meta-analysis does not establish that exercise causes symptom improvement (it combines RCTs but does not itself prove efficacy universally); does not identify which patients will or will not benefit; does not address the mechanistic basis of reported improvements; does not resolve debates about optimal exercise prescription or the risk of post-exertional malaise in subgroups not well-represented in the trials reviewed; and does not validate exercise as a primary treatment for ME/CFS rather than a symptom-management tool.

Topics

Interventions Sleep Post-Exertional Malaise

Metadata

DOI: 10.1016/j.jpsychores.2026.112677
PMID: 42000527
Evidence level: Higher-level evidence type — systematic reviews, meta-analyses, guidelines, or major syntheses (study type, not a quality guarantee)
Last updated: 20 April 2026

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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 →

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The first block is for the primary paper and is the citation you should use in research work. The atlas-snapshot line only applies if you are specifically referring to this atlas’s reading of the paper on the date shown.

Primary citation

Zhao, Liping, Gou, Bo, & Zhang, Meng (2026). The efficacy of exercise in patients with myalgic encephalomyelitis/chronic fatigue syndrome: A systematic review and meta-analysis.. Journal of psychosomatic research. https://doi.org/10.1016/j.jpsychores.2026.112677

BibTeX

@article{mecfsatlas-zhao-2026-efficacy-exercise,
  author  = {Zhao, Liping and Gou, Bo and Zhang, Meng},
  title   = {The efficacy of exercise in patients with myalgic encephalomyelitis/chronic fatigue syndrome: A systematic review and meta-analysis.},
  journal = {Journal of psychosomatic research},
  year    = {2026},
  doi     = {10.1016/j.jpsychores.2026.112677},
  note    = {PubMed: 42000527},
  url     = {https://www.mecfsatlas.com/evidence/zhao-2026-efficacy-exercise},
}

Atlas snapshot reference

ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-04-21. https://www.mecfsatlas.com/evidence/zhao-2026-efficacy-exercise

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