Well, I stick by fatigue being one symptom, muscle pain being another, etc. So I think exercise over a certain level of activity, you don't just get fatigue and nothing else (where fatigue is one symptom, muscle pain is another, sore throat is another, etc). If you mean fatigue covers other symptoms, of course in your scenario if the symptoms brought on by exercise can be described by one word, fatigue, then one can say that it doesn't bring on a lot of symptoms. I think if they want to be honest with professionals, they should make clear that exercise in ME brings on more than just fatigue (my definition) and make clear that there is an abnormal response to exercise. As the original research paper in this thread shows, there are well over a dozen studies that have found exercise abnormalities in the condition. But the advice gives the impression that the response to exercise in the condition is not abnormal, or at least doesn't make clear it's abnormal.