You do not have a clue.
Ah, but I do.
Exercise cured it. But non-exercise causes relapse, in which there is no energy to do anything.
So, if you allow yourself to waste away, you waste away! Surprise!
That’s my experience with my ex, who was fine when she exercised. When she slacked off, she was a lump of non-humanity. Mostly she slacked off. No muscle tone. Everything hurt. She slept infinite hours. With or without the fracking opiates.
Huge waste of humanity on a “syndrome” caused by not moving your butt.
Yes, I’m experienced with it, and it ruined the lives of so many over a simple unwillingness to move her lazy a$$.