E2 ModerateModerate confidencePEM not requiredCross-SectionalPeer-reviewedReviewed
Standard · 3 min
Generalized joint hypermobility is more common in chronic fatigue syndrome than in healthy control subjects.
Nijs, Jo, Aerts, Annemie, De Meirleir, Kenny · Journal of manipulative and physiological therapeutics · 2006 · DOI
Quick Summary
This study found that people with ME/CFS are about 5 times more likely than healthy people to have loose, overly flexible joints (joint hypermobility). Researchers tested 68 ME/CFS patients and 69 healthy volunteers using physical exams and knee movement tests. Most ME/CFS patients in the study had joint hypermobility, but surprisingly, this looseness did not seem to be connected to how much pain they experienced.
Why It Matters
This study reveals that joint hypermobility may be a distinct musculoskeletal feature affecting a substantial subgroup of ME/CFS patients, potentially contributing to disability and symptoms. Understanding this association could help clinicians better characterize ME/CFS heterogeneity and tailor physical interventions appropriately, and it raises questions about whether connective tissue abnormalities play a role in disease pathophysiology.
Observed Findings
20.6% of ME/CFS patients met criteria for generalized joint hypermobility compared to only 4.3% of healthy controls (statistically significant).
58.8% of ME/CFS patients fulfilled diagnostic criteria for benign joint hypermobility syndrome (BJHS).
No significant association was found between generalized joint hypermobility and self-reported pain severity or disability measures.
Knee proprioception was similar between ME/CFS patients and healthy controls.
Joint hypermobility was not associated with knee proprioception deficits in the CFS group.
Inferred Conclusions
A clinically meaningful subgroup of ME/CFS patients present with generalized joint hypermobility, suggesting possible connective tissue involvement in a subset of the disease.
Most ME/CFS patients in this sample fulfilled BJHS criteria, indicating widespread joint hypermobility is a common feature of the condition.
Joint hypermobility in ME/CFS may not directly explain musculoskeletal pain or proprioceptive dysfunction, suggesting other mechanisms underlie these symptoms.
Remaining Questions
Does joint hypermobility contribute to functional limitations, exercise intolerance, or post-exertional malaise in ME/CFS?
What This Study Does Not Prove
This study does not prove that joint hypermobility causes ME/CFS or that it is responsible for the fatigue or cognitive symptoms central to the condition. The cross-sectional design cannot establish causality or directionality. Additionally, the lack of association between hypermobility and pain severity does not rule out hypermobility contributing to other CFS-related symptoms or functional limitations.
Tags
Symptom:PainFatigue
Method Flag:PEM Not DefinedWeak Case DefinitionSmall SampleExploratory Only
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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