Hi sportsfan, I havnt broken my leg but have broken my right radius twice. The first time was a young kid and cant remember the post cast issues, second time I was 18, really did a good job on screwing up a tackle playing football

, anyways I had nearly no movment in my wrist when they took the cast off (6 weeks later), the ultrasounded it for about 10 minutes, that helped a bit - the vibrations helps loosen unused muscles and tendons (or something like that) the big helper was a couple of days later I went snorkling for a few hours, same thing the next day, after that no problem, my guess was all the resistance work while swimming, hope that helps
Andrew