Petter, Elisabeth, Scheibenbogen, Carmen, Linz, Peter et al. · Journal of translational medicine · 2022 · DOI
Researchers used a special type of MRI scan to measure sodium levels in the leg muscles of ME/CFS patients and healthy people. They found that ME/CFS patients had higher sodium buildup in their muscles both at rest and after exercise, and this sodium overload was linked to weaker grip strength. This suggests that muscles in ME/CFS may not be handling sodium properly, which could contribute to fatigue and muscle pain.
This study provides direct biophysical evidence that sodium dysregulation in muscle tissue may be a mechanism underlying ME/CFS fatigue and weakness, potentially opening new avenues for targeted therapeutic interventions. Understanding the pathophysiological basis of muscle dysfunction is critical for developing treatments beyond symptomatic management.
This study does not establish causation—elevated muscle sodium may be a consequence rather than a cause of ME/CFS pathology. The small sample size (6 patients) and restriction to female participants limits generalizability to the broader ME/CFS population. The cross-sectional design cannot determine whether sodium overload precedes symptom onset or develops secondary to disease processes.
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
Petter, Elisabeth, Scheibenbogen, Carmen, Linz, Peter, Stehning, Christian, Wirth, Klaus, Kuehne, Titus, et al. (2022). Muscle sodium content in patients with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.. Journal of translational medicine. https://doi.org/10.1186/s12967-022-03616-z
BibTeX
@article{mecfsatlas-petter-2022-muscle-sodium,
author = {Petter, Elisabeth and Scheibenbogen, Carmen and Linz, Peter and Stehning, Christian and Wirth, Klaus and Kuehne, Titus and Kelm, Marcus},
title = {Muscle sodium content in patients with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.},
journal = {Journal of translational medicine},
year = {2022},
doi = {10.1186/s12967-022-03616-z},
note = {PubMed: 36494667},
url = {https://www.mecfsatlas.com/evidence/petter-2022-muscle-sodium},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-28. https://www.mecfsatlas.com/evidence/petter-2022-muscle-sodium
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