Glossary

A glossary of *key* ME-related terms.

C
crash - (noun) -- see post-exertional malaise

H
Heart rate monitor (HRM) - (noun) a device that measures your heart rate / pulse. Typically a chest strap, wrist strap, or mobile phone app. See also Pacing with a heart rate monitor

Heart rate variability (HRV) - a measurement of the specific changes in time (or variability) between successive heart beats. This is related to autonomic and cardiovascular function. See also Pacing with a heart rate monitor

O
orthostatic intolerance (OI) -- is the development of symptoms when standing upright which are relieved when reclining

P
post-exertional malaise (PEM)- (noun) a worsening of ME symptoms due to physical or cognitive exertion

post-exertional neuroimmune exhaustion -- see post-exertional malaise

T
Two-day cardiopulmonary exercise test