I am having the same issue, and no clue even what doctor to ask about this. I had covid pretty bad in 2021, seem to get a little better no huge muscle issues, than either got another variant of covid in 2023, and now my muscles hurt so much doing nothing at all. Prior, it was not anywhere like this. 2 leg squats and I can barely walk for a few days with super tight burning thighs. If anyone can actually come up with any blood tests, or doctor's who might know what to look for, please post about it. Right now almost all of my doctor's are clueless as my CK and CRP levels are fine. Has to be some other tests to figure out why the intense muscle pain just as the original person posted.

A lot of money pumped into covid research, but I have yet to find any clinic that actually knows anythiing about how to treat long covid. Even in Arizona, Banner Health says they have long covid clinic, and when I went, the doctor said to me he has no clue why my muscles hurt from covid, and to just keep trying to get better. Hope everyone can ban together to try to get some actual money pulled into clinics that can help long haulers, etc.