Latimer, Kelly M, Gunther, Althea, Kopec, Michael · American family physician · 2023
Fatigue is a very common reason people visit their doctors, and it can significantly impact daily life and work safety. This guideline explains that fatigue can come from different causes—normal tiredness that improves with rest and better habits, fatigue from other medical conditions, or chronic fatigue like ME/CFS. ME/CFS is a serious, long-lasting illness with no proven cure that causes a symptom called postexertional malaise, where activity makes symptoms worse, so patients need to carefully manage their energy levels.
This guideline is important because it provides primary care clinicians with evidence-based diagnostic criteria and management frameworks for ME/CFS, helping reduce diagnostic delays and harmful treatments. For ME/CFS patients, it validates that their condition is a distinct medical disorder with biological abnormalities and emphasizes that standard exercise recommendations can cause harm—supporting the need for individualized, pacing-based approaches rather than conventional rehabilitation.
This guideline does not present new clinical trial data proving the efficacy of any specific ME/CFS treatment; rather, it synthesizes existing evidence and explicitly states that no proven cure exists. It acknowledges the lack of established treatments and does not establish causation for fatigue mechanisms, only describes the abnormalities associated with ME/CFS. The guideline also does not provide quantitative data on prognosis or recovery rates in ME/CFS populations.
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
Latimer, Kelly M, Gunther, Althea, & Kopec, Michael (2023). Fatigue in Adults: Evaluation and Management.. American family physician. https://pubmed.ncbi.nlm.nih.gov/37440739/
BibTeX
@article{mecfsatlas-latimer-2023-fatigue-adults,
author = {Latimer, Kelly M and Gunther, Althea and Kopec, Michael},
title = {Fatigue in Adults: Evaluation and Management.},
journal = {American family physician},
year = {2023},
note = {PubMed: 37440739},
url = {https://www.mecfsatlas.com/evidence/latimer-2023-fatigue-adults},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-25. https://www.mecfsatlas.com/evidence/latimer-2023-fatigue-adults
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