This article is from the Chronic Fatigue Syndrome (CFS) FAQ, by cfs-news@cais.com (Roger Burns) with numerous contributions by others.
CFS patients will need to avoid stressful activities, and each
patient's toleration for stress will be different, and can change). It
is nonetheless important for patients who can exercise to do so, up to
their level of toleration. But this should be done with great care,
since crossing the "invisible line" of exercise intolerance for this
illness may prompt a serious relapse, and may negatively affect the
longer-term future course of the illness.
 
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