I have been training J.B. since January 2014 to meet strength goals, and coaching him on his knee replacement rehabilitation. This amazing man made it a personal goal to work out diligently three times per week with the program(s) I designed for him. He achieved 100 workouts in the 8 months since our first appointment. Here he is doing a Low Row, wearing the badge that I made for him to acknowledge his good work. He has seen all kinds of improvements since he started working out. You can too!
Just read a short article by injury specialist and exercise physiologist Rick Kaselj, MS suggesting the position you keep your knee in, is partly causing knee pain.
Positions include 1. sitting down with your knees bent. 2. With your feet crossed 3. Your feet behind you and under your chair.