Tanaka, Masaaki, Watanabe, Yasuyoshi · Medical hypotheses · 2010 · DOI
This article proposes a new theory about how ME/CFS might develop: repeated overwork or stress could train your body and brain to respond with fatigue and an urge to rest, similar to how habits form. The authors suggest that once this pattern becomes established, your body may continue producing fatigue even when you're no longer overworking. This theory could eventually lead to new ways of treating ME/CFS.
This hypothesis attempts to unify diverse findings about ME/CFS (viral triggers, stress, immune dysfunction, autonomic changes) under a single mechanistic framework, which could guide future research and treatment development. If validated, co-conditioning theory might explain why ME/CFS symptoms persist after the initial trigger resolves and could support development of reconditioning-based interventions.
This study does not provide experimental evidence, patient data, or mechanistic proof—it is a theoretical proposal only. It does not prove that conditioning is the actual cause of ME/CFS, nor does it establish that reconditioning therapy would be effective. The theory cannot be tested or falsified from the abstract alone and requires empirical validation in patient populations.
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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