Larun, Lillebeth, Brurberg, Kjetil G, Odgaard-Jensen, Jan et al. · The Cochrane database of systematic reviews · 2016 · DOI
This review looked at eight studies involving 1,518 people with ME/CFS to see if exercise therapy helps. Most studies showed that exercise reduced fatigue and improved sleep and physical function compared to no treatment or relaxation. Exercise therapy seemed to work about as well as cognitive-behavioral therapy, though the quality of evidence varied.
This is the most comprehensive review to date examining exercise therapy's role in ME/CFS management. For patients, it provides evidence-based information about a commonly recommended treatment; for clinicians and researchers, it identifies that exercise may benefit fatigue and function while highlighting the need for studies specifying optimal exercise type, duration, and intensity.
This review does not establish that exercise is universally safe or beneficial for all ME/CFS patients, as serious adverse events were sparsely reported and may have been underdetected. It does not clarify whether different types or intensities of exercise have different risk-benefit profiles, nor does it address whether exercise might worsen outcomes in subgroups of patients, particularly those with post-exertional malaise. The review cannot determine causation from the associations observed—only that supervised exercise in trials was associated with reported fatigue improvements.
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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