(10-60 minutes, 3 times per week)
This exercise can be started immediately after suffering an ACL injury. The key is to retain motion of the knee. When sitting on the bike it is important to set the seat height to work on both knee extensions (straightening) and flexion (bending). If one sets the seat higher, it will force the knee into extension. If one sets the seat lower, it will work the flexion.
- Resistance is not important, only the motion. If one cannot initially make a full rotation, half rocking rotations will be helpful.