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Comparison of six-degree-of-freedom knee kinematics during walking between those who passed the return-to-sports test and those who failed 9 months after ACL reconstruction. (A) Anterior-posterior translation. (B) Knee flexion and extension. (C) Medial-lateral translation. (D) Varus-valgus movement. (E) Proximal-distal translation. (F) External-internal rotation. * Significant difference between groups. NRTS, not return-to-sports; RTS, return-to-sports.
