I have literally lost all of my muscle power, it happened in a very short period of time, I think over 2 weeks, somewhere last year.
I can't even open a bottle on some days. I sometimes go for a walk, but have to stop in time, cause I don't want to risk not being able to get back home. Can't lift something that weighs more than 5kilos. Walking up the stairs is like climbing a mountain.
This is something my dr told me right from the beginning: first you treat, and it can take a long time, after treatment, you can start rehabilitation. Don't start rehabilitation before getting better, it will ask too much of your body and will make you worse again.
I've never been the sporty one, but I've started drooling when I see someone working out... imagine that...