Either way, they're wrong. A recent study out of Norway surveyed 828 people with ME/CFS to find out which treatments helped and which didn't. Among their findings:
One of the most misconceived treatments recommended by the medical profession is graded exercise therapy, yet 79% of the participants experience deterioration as a result. It stands to reason that with such limited energy to expend, using too much on exercise leaves woefully little, if any, energy for tasks of survival such as fixing meals, eating, paying bills, and bathing.The full article about the study is here. Might be a handy printout for ME/CFS patients who are dreading their next appointment with the GP.