Walking in the Absence of Anterior Cruciate Ligament: The Role of the Quadriceps and Hamstrings

The actual need for surgical reconstruction of an injured anterior cruciate ligament (ACL) is still a matter debate. aim this study was to quantify and analyze the knee kinematics force redistribution resulting from ACL sacrifice consequent effects changing quadriceps hamstring activity during walking. A three-dimensional musculoskeletal model used simulate behavior joint gait cycle, in different testing conditions: ACL-deficient knee, with hamstrings inactivated inactivated. Our results showed that medial collateral (MCL) main passive stabilizer translation tibia. Furthermore, compensation produced by walking were quantified analyzed. In case sacrifice, reducing would allow relieving all ligaments general, except posterior ligament, which required more consistent recruitment support phase. Meanwhile, crucial not only compensate absence limiting tibial displacement but also reduce risk MCL injury.