@xebex I guess lately I had a couple of episodes that could be classified as PEM, though I'm not entirely sure. I would prefer an expert to say it, but I have no means right now to get evaluated. Before? I get ups and downs in fatigue and other symptoms, but I'm not really sure I could pin point them to specific exertional activities. Maybe it wasn't CFS and now it is, but honestly I think that under each of us' condition there is something different.