I did ask here sometime ago, and a couple of people replied that they lack the muscle impairment, but had other common ME symptoms, so it's not just me. It does sound like a very small subgroup.
Like me, others have reported being able to lift weights, ride bikes, etc, at the same level as pre-ME. That qualifies as evidence. In proper scientific studies, there may be a bias against people who don't show the muscle impairment (disqualify for the study), or perhaps we're just so rare that we haven't showed up in studies. Maybe in a large study, there's a graph with one point way out from the others, and it just gets dismissed as a measurement error or whatever.
Just because we haven't been covered in a published paper doesn't mean that we don't exist.
Like me, others have reported being able to lift weights, ride bikes, etc, at the same level as pre-ME. That qualifies as evidence. In proper scientific studies, there may be a bias against people who don't show the muscle impairment (disqualify for the study), or perhaps we're just so rare that we haven't showed up in studies. Maybe in a large study, there's a graph with one point way out from the others, and it just gets dismissed as a measurement error or whatever.
Just because we haven't been covered in a published paper doesn't mean that we don't exist.
So you can exercise and do physical activity to your hearts content and it has no effect on your symptoms? What are your symptoms?
When I am at baseline where I haven’t overexterted much prior and do not have much symptom buildup I can walk and do some physical activity like running errands without any immediate issues. But the physical (and mental exertion) to do this adds up and with energy deficit symptoms eventually start increasing.