Hi,
Did they (mri or something ) tell you, you have atrophy or is it your thoughts because of being immobile for a long period ?
I hardly could walk for two years and was confinced it would be extremely hard to build up strenght after that . Depends on what you could do before etc . Is it walking en climing stairs etc you want to do again there is one simple goal : start doing it. First months where hard for me. Build up slowly. Now one year later (although still some pain) strenght feels as before.
. Bought me a fitbit : that helped to check for progress. Long walks where not a option for me : making more steps over the whole day : worked good to get stronger. I takes time and patience. But i can imagine its different for everone. Age, health etc.
I was very pessimistic at the time if i would ever be able to get some strenght back. But this worked. So you can do it too !