Must admit, I never liked exercise even before I became intolerant to it, but I do know a chap who identifies as having PVFS, and who occasionally succumbs to temptation, goes to the gym and then feels wretched, in the same way that a normal human might lapse with cakes and bacon sandwiches.
So there are no circumstances where exercise is not good for people then; always good no negative effects.
yeah but, have a neighbor w/lingering covid (three weeks or so) and she cannot not do strenuous yard work all day. Maybe she takes a med that makes her that way, who knows, for depression, or maybe anxiety makes one that way. She told me she cannot sit still and yet suffers from covid fatigue...well it must not be enough fatigue to teach her a lesson.