I want in on this. I have normally been pretty active and workout but I had to take a few months off from everything because I had cartilage inflammation behind my kneecap. November will be a rocky start off for me (traveling a lot) but I plan to change my eating habits and get in as much exercise as possible. My stats:
Age: 36 (37 on 11th)
Goal: Closer to 130...mostly just to be fit, trim, and back in my size 8 jeans.
Injuries always really put a cramp in things. I myself have to be careful with my left knee, especially when doing squats and doing cycling.
Are you able to do any sort of upper body workouts, so as not to bother your knee? You can do punching actions (amazing how just punching the air for 20 minutes can get your heart rate up) or you can do upper body weights. And if you're careful with body position, you can certainly do sit-ups and ab workouts. Always think about what you CAN do, and not just what your injuries limit you to.