Davenport, Todd E, Stevens, Staci R, Stevens, Jared et al. · Work (Reading, Mass.) · 2020 · DOI
Researchers tested whether a standard exercise test (cardiopulmonary exercise test, or CPET) could reliably measure how ME/CFS affects the body's ability to exercise. They had 51 women with ME/CFS and 10 healthy women do the same exercise test twice, 24 hours apart. The results showed that the measurements were consistent and clearly different between the two groups, suggesting that CPET could be a useful tool for assessing ME/CFS.
CPET measurements could serve as an objective biomarker for ME/CFS, helping clinicians diagnose the condition and assess disease severity in a standardized, reproducible way. This is particularly important because ME/CFS currently lacks specific laboratory tests, making reliable physiological measurements valuable for both patient care and research.
This study does not establish that abnormal CPET results cause ME/CFS symptoms or explain the underlying mechanisms of the disease. The study's reliability estimates are based on a relatively small sample of females only, so findings may not generalize to male patients or diverse demographic groups. Additionally, while CPET measurements are consistent and different between groups, the study does not establish whether CPET can predict treatment response or clinical outcomes.
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
Davenport, Todd E, Stevens, Staci R, Stevens, Jared, Snell, Christopher R, & Van Ness, J Mark (2020). Properties of measurements obtained during cardiopulmonary exercise testing in individuals with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.. Work (Reading, Mass.). https://doi.org/10.3233/WOR-203170
BibTeX
@article{mecfsatlas-davenport-2020-properties-measurements,
author = {Davenport, Todd E and Stevens, Staci R and Stevens, Jared and Snell, Christopher R and Van Ness, J Mark},
title = {Properties of measurements obtained during cardiopulmonary exercise testing in individuals with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.},
journal = {Work (Reading, Mass.)},
year = {2020},
doi = {10.3233/WOR-203170},
note = {PubMed: 32568145},
url = {https://www.mecfsatlas.com/evidence/davenport-2020-properties-measurements},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-26. https://www.mecfsatlas.com/evidence/davenport-2020-properties-measurements
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