Post-exertional malaise (PEM) in ME/CFS

Post-exertional malaise (PEM), the cardinal feature of ME/CFS, is particularly debilitating as it involves the amplification of existing symptoms, alongside the potential appearance of new ones, following minimal exertion. However, the term “exertion” may be misconstrued, by those unfamiliar with ME/CFS, as activities typically considered high intensity by healthy individuals. Consequently,…