If you're working on knee bending after total knee replacement surgery, here's a simple way to make progress right at home or in the gym… Kneeling on a workout bench allows the knee to bend naturally while taking pressure off the hip and low back. Instead of forcing the motion, you simply let gravity and your body weight guide the stretch. . Start by kneeling with both knees on the bench—use your hands for support if needed. . Shift gently over the surgical knee and allow it to bend comfortably.