Important Exercises to do after knee replacement After knee replacement surgery, it is important to follow a proper exercise program to help speed up your recovery and regain strength, flexibility, and mobility in your knee. Here are some exercises that you can do after knee replacement surgery includes: Supported knee bends while sitting Ankle pumps Bed supported knee bends Quadriceps sets Straight leg raises etc. If you feel any type of difficulty then you can consult with the surgeon.