User:Sisyphus

Sisyphus,

PEM is usually delayed and please do not pull that information off again. My whole world fell into place when I learned that information. 24-72 hours is the usual delay time of PEM. Studies, ME/CFS organizations, and patients are reporting this delay and are in agreement. Please, do not take that information off again.

Additionally, patients and ME/CFS advocacy groups have been requesting testing (CPET and other measurements) be done 48 and72 hours out because of the delay and they want PEM captured several days out when it onsets.

MEcfsFMS

post-exertional malaise (PEM) - A notable exacerbation of symptoms brought on by small physical or cognitive exertions. PEM may be referred to as a "crash" or "collapse" and can last for days or weeks. Symptoms can include cognitive impairments, muscle pain, trouble remaining upright (orthostatic intolerance), sleep abnormalities, and gastro-intestinal impairments, and others.

two-day cardiopulmonary exercise test (CPET) - A diagnostic test which involves testing an ME/CFS patient exercising on an exercise machine, while monitoring their respiration, especially oxygen consumption. This test is repeated the following day in order to confirm the patient's inability to replicate the first-day performance. This test is thought to be the most objective way to detect post-exertional malaise.