Wormgoor, Marjon E A, Rodenburg, Sanne C · Journal of translational medicine · 2021 · DOI
This review looked at 18 studies testing physiotherapy (physical therapy) for ME/CFS, paying special attention to post-exertional malaise (PEM)—the worsening of symptoms after activity that defines ME. The researchers found that treatments appearing to help patients with general chronic fatigue showed less benefit when studied in patients with stricter ME/CFS definitions that include PEM, and may actually cause harm in ME patients. The study warns that physical therapy approaches effective for milder conditions should not be used for ME patients with prominent PEM.
This study clarifies a critical gap in ME/CFS treatment evidence: many older studies used loose diagnostic criteria that may not represent true ME with PEM. For patients with severe ME characterized by PEM, this systematic review suggests that standard physiotherapy approaches may be ineffective or harmful, highlighting the urgent need for research specifically in PEM-prominent populations and potentially different treatment paradigms.
This review does not prove that all forms of physiotherapy are harmful to ME patients—only that current evidence does not support its use in PEM-centered ME. It also cannot establish what types of interventions might actually be safe or beneficial for ME, as the included studies were not designed to evaluate PEM-aware treatment approaches. The review reflects a deficit of rigorous research rather than proof of harm from all physical interventions.
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 →
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
Wormgoor, Marjon E A & Rodenburg, Sanne C (2021). The evidence base for physiotherapy in myalgic encephalomyelitis/chronic fatigue syndrome when considering post-exertional malaise: a systematic review and narrative synthesis.. Journal of translational medicine. https://doi.org/10.1186/s12967-020-02683-4
BibTeX
@article{mecfsatlas-wormgoor-2021-evidence-base,
author = {Wormgoor, Marjon E A and Rodenburg, Sanne C},
title = {The evidence base for physiotherapy in myalgic encephalomyelitis/chronic fatigue syndrome when considering post-exertional malaise: a systematic review and narrative synthesis.},
journal = {Journal of translational medicine},
year = {2021},
doi = {10.1186/s12967-020-02683-4},
note = {PubMed: 33397399},
url = {https://www.mecfsatlas.com/evidence/wormgoor-2021-evidence-base},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-28. https://www.mecfsatlas.com/evidence/wormgoor-2021-evidence-base
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