Reinhart, W H, Fleisch, F · Praxis · 2001
Fatigue is a very common symptom that doctors see in many patients. This editorial discusses how doctors should evaluate someone with fatigue by taking a careful history, doing a physical exam, and ordering appropriate tests. When other diseases are ruled out, chronic fatigue syndrome may be diagnosed, though its causes remain unknown. The most proven treatments are graded exercise, cognitive behavioral therapy, and antidepressants if depression or anxiety are present.
This editorial provides clinicians with a structured diagnostic framework for evaluating fatigue and contextualizes ME/CFS within the broader differential diagnosis of fatigue. It highlights that despite decades of clinical experience, the underlying mechanisms of ME/CFS remain unclear and reinforces the limited evidence base for most treatments beyond exercise, CBT, and symptom management.
This editorial does not present original research data, experimental findings, or outcome measures. It reflects 2001-era understanding and does not address post-exertional malaise (PEM) specifically or discuss post-viral mechanisms now recognized in ME/CFS research. The recommendations for graded exercise have since been questioned by patient-reported harm data and more recent mechanistic understanding.
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
Reinhart, W H & Fleisch, F (2001). [Fatigue].. Praxis. https://pubmed.ncbi.nlm.nih.gov/11817247/
BibTeX
@article{mecfsatlas-reinhart-2001-fatigue,
author = {Reinhart, W H and Fleisch, F},
title = {[Fatigue].},
journal = {Praxis},
year = {2001},
note = {PubMed: 11817247},
url = {https://www.mecfsatlas.com/evidence/reinhart-2001-fatigue},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-30. https://www.mecfsatlas.com/evidence/reinhart-2001-fatigue
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