Wessely, S, David, A, Butler, S et al. · The Journal of the Royal College of General Practitioners · 1989
This paper suggests that ME/CFS develops when an initial illness leads to reduced activity, which then worsens fitness and symptoms in a self-reinforcing cycle. The authors propose that cognitive behavioral therapy—a talking therapy that helps patients understand how both physical inactivity and mood problems contribute to their symptoms—combined with gradual return to activity may help break this cycle.
This study is foundational in proposing structured psychological and rehabilitative approaches to ME/CFS management and influenced decades of subsequent treatment research. It highlights the potential role of addressing both physical deconditioning and mood disorders in clinical practice.
This paper does not prove that CBT or graded activity are effective treatments—it is a theoretical proposal, not a clinical trial. It does not establish whether the proposed cycle of inactivity and deconditioning is the primary driver of ME/CFS or one of multiple contributing factors. The paper does not rule out ongoing infection or other biological mechanisms as contributors to symptom perpetuation.
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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