Post-Exertional Malaise
Pronunciation: post-ig-ZUR-shuh-nul muh-LAYZ
A worsening of symptoms following physical or mental exertion that is disproportionate to the activity performed.
Full Definition
Post-exertional malaise (PEM) is a hallmark symptom of myalgic encephalomyelitis/chronic fatigue syndrome and other post-viral conditions that significantly impacts exercise rehabilitation approaches. PEM typically manifests as a delayed worsening of fatigue, cognitive dysfunction, pain, and other symptoms that can occur hours to days after minimal exertion. The severity and duration of PEM episodes vary among individuals and can be triggered by physical, cognitive, or emotional stressors. In exercise rehabilitation, recognition of PEM is crucial for developing appropriate treatment protocols that avoid symptom exacerbation. Traditional exercise prescription models may be contraindicated for patients experiencing PEM, requiring modified approaches focused on energy conservation and symptom management.
Usage
Usage note: Always capitalize as PEM when using the acronym; distinct from normal exercise fatigue or DOMS.
In Context
- "The patient experienced significant post-exertional malaise following the initial assessment, requiring modification of the treatment approach." — clinical note
- "Screening for post-exertional malaise is essential before implementing any exercise rehabilitation program." — assessment protocol