Ouch is international.
Well, if it helps you, on 12/23 I was flat on my butt on my driveway, in my robe and house shoes after slipping on ice. Compounded it by trying to stand and falling down and whacking the left knee (just a ding thank goodness). As you see above, I am pretty well there, but a lot of strength improvement to come.
Good luck on the immobilizers, but it is my opinion 30 days is very optimistic. I would think you might wait until 6 weeks, but follow the Ortho Doctor's orders.
I agree with dbrow16. I was in an immobilizer for 4 weeks and when I received my dial brace, I was at a zero for another 4 weeks. I did go to p.t after 4 weeks post op