“Post-exertional malaise (PEM) is the hallmark clinical feature of myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS).” ExerciseChronic Fatigue SyndromeMyalgic EncephalomyelitisMe CfsPost Exertional MalaiseChronic Fatigue Syndrome QuotesExercise IntoleranceExertion Intolerance Author:Todd E. Davenport