I second the recommendation to avoid Omega-6. Cut out all the veg/seed oils....that stuff is poison. I saw some interesting research awhile ago that the prevalence of torn ACL may be greater in large part because of dietary changes (specifically modern industrial veg/seed oils).
Eat meat.
At 43, and lifting heavier than ever, my joints, muscle and connective tissues have never been so good since (been largely carnivore for several months now)
Don't have much to say about physical therapy, but am interested.