Friedberg, Fred · Journal of behavior therapy and experimental psychiatry · 2002 · DOI
This study looked at one patient with ME/CFS who received treatment aimed at gradually increasing physical activity. Surprisingly, while the patient reported doing more walking and felt much better overall, a step counter showed he was actually taking fewer steps per week by the end of treatment. The improvement seemed to come from doing activities that made him feel better emotionally, rather than from simply moving more.
This study highlights an important measurement challenge in ME/CFS treatment research: self-reported improvements may not align with objective activity data, and patients may benefit from activity changes that reduce stress rather than simply increase overall volume. Understanding these discrepancies is crucial for designing treatments and interpreting trial outcomes accurately.
This single case study cannot establish whether graded activity is effective for ME/CFS more broadly, nor can it determine causation between specific interventions and outcomes. The discrepancy between subjective and objective measures raises questions about what 'improvement' means and whether self-report alone is reliable for assessing treatment efficacy in this population.
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
Friedberg, Fred (2002). Does graded activity increase activity? A case study of chronic fatigue syndrome.. Journal of behavior therapy and experimental psychiatry. https://doi.org/10.1016/s0005-7916(02)00038-1
BibTeX
@article{mecfsatlas-friedberg-2002-does-graded,
author = {Friedberg, Fred},
title = {Does graded activity increase activity? A case study of chronic fatigue syndrome.},
journal = {Journal of behavior therapy and experimental psychiatry},
year = {2002},
doi = {10.1016/s0005-7916(02)00038-1},
note = {PubMed: 12628637},
url = {https://www.mecfsatlas.com/evidence/friedberg-2002-does-graded},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-29. https://www.mecfsatlas.com/evidence/friedberg-2002-does-graded
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