Once you can bear weight on your leg without pain, start adding advanced exercises to your workout. Using gym equipment can be a good way to improve overall knee function. Before you begin, talk with a physical therapist or certified athletic trainer. Learn how to use the equipment the right way. Start slowly, and rest between each set. As you feel stronger, increase the number of sets.
CAUTION: Ask your healthcare provider if you’re ready to do this exercise. If you do too much too soon, you could create new knee problems, or even re-injure your knee.
Sit with your head and back lined up. Set the machine to a light weight. Put your feet on the plate with your knees slightly bent. Tighten your stomach muscles, but don't hold your breath.
Push until your legs are almost completely straight. Do not lock your knees. Then slowly and steadily return your legs to its original position. After you gain strength, try one leg.
Do 2 sets of 10 repetitions.
As your knee gets stronger, begin this exercise with your knee bent at 90 degrees.