Clark, Lucy V, McCrone, Paul, Pesola, Francesca et al. · Journal of psychosomatic research · 2021 · DOI
This study followed up with CFS patients one year after they received either guided graded exercise self-help (a structured program to gradually increase activity) or standard medical care. While the exercise program showed better results after 12 weeks, by 15 months both groups had improved similarly, with the exercise group maintaining their gains and the standard care group catching up. The exercise program cost slightly more but was considered cost-effective based on quality of life improvements.
This study provides important evidence on the durability of graded exercise interventions beyond the short-term and demonstrates cost-effectiveness data relevant to healthcare policy decisions about CFS treatment options. Understanding long-term trajectories of both intervention and standard care helps patients and clinicians make informed decisions about treatment approaches.
This study does not prove that graded exercise is the best treatment for all CFS patients, as both groups improved over time and differences disappeared at follow-up. It also cannot establish whether the improvements were due to the exercise program itself, natural recovery, regression to the mean, or other unmeasured factors. The cost-effectiveness conclusion carries substantial uncertainty and may not apply to all healthcare contexts.
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
Clark, Lucy V, McCrone, Paul, Pesola, Francesca, Vergara-Williamson, Mario, & White, Peter D (2021). Guided graded exercise self-help for chronic fatigue syndrome: Long term follow up and cost-effectiveness following the GETSET trial.. Journal of psychosomatic research. https://doi.org/10.1016/j.jpsychores.2021.110484
BibTeX
@article{mecfsatlas-clark-2021-guided-graded,
author = {Clark, Lucy V and McCrone, Paul and Pesola, Francesca and Vergara-Williamson, Mario and White, Peter D},
title = {Guided graded exercise self-help for chronic fatigue syndrome: Long term follow up and cost-effectiveness following the GETSET trial.},
journal = {Journal of psychosomatic research},
year = {2021},
doi = {10.1016/j.jpsychores.2021.110484},
note = {PubMed: 33895431},
url = {https://www.mecfsatlas.com/evidence/clark-2021-guided-graded},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-29. https://www.mecfsatlas.com/evidence/clark-2021-guided-graded
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