...
I've had 12 months off Saint, but I wasn't injured per se. In fact, I wasn't feeling very good for the whole 12 months off (many reasons why, which bar do you start at?!) and feeling a lot better crawling through workouts now.
I think probably the best thing is to not focus too much on your physique. you're gonna lose some - it's gonna happen - and you can get it back, quicker than you think after a lay off.
Try stuff you can do and which might not have been your top pick for intense exercise before - maybe casual walks or bike rides, swimming, just stuff that's actually fun, won't hurt you and gets you some fresh air.
and hang in there, you'll be back in no time! IronMike