Fitness

15 years ago I tore cartilage and snapped a ligament. It would bend in and hurt a lot. They did minor surgery to clean up the cartilage and hasn't been much of a problem since. Now, it's done it 2 times in the last 2 days. No pain-i think only because I catch it before it does damage(more damage?)

Any ideas what I can do to stregthen it?

Squats and deadlifts.