We hypothesized that insults to the knee as significant as an
ACL rupture and reconstruction would alter motor performance
and the relative contributions of the knee and hip musculature during the squat exercise. Specifically, we believed that our postoperative subjects would adopt a movement strategy that increased the hip extensor moments of force and decreased the knee extensor moments of force in their injured
limb during performance of the maneuver. To characterize
these relative contributions, we report the bilateral lower-extremity
kinematics and kinetics of postoperative ACL reconstruction
patients during performance of the back squat exercise.