Why Does the Knee Buckle One Year After ACL Reconstruction?A buckling knee one year after ACL reconstruction often signals functional instability rather than graft failure. This instability arises from delayed neuromuscular control and proprioceptive recovery, which can take up to 18-24 months post-surgery. Effective rehabilitation focuses on proprioceptive retraining, reactive neuromuscular training, rotational control, and strength-endurance exercises to restore…A buckling knee one year after ACL reconstruction often signals functional instability rather than graft failure. This instability arises from delayed neuromuscular control and proprioceptive recovery, which can take up to 18-24 months post-surgery. Effective rehabilitation focuses on proprioceptive retraining, reactive neuromuscular training, rotational control, and strength-endurance exercises to restore automatic protective muscle responses. Advanced movement analysis aids personalized recovery plans. Identifying and addressing these neuromuscular deficits is crucial for regaining knee stability, preventing reinjury, and ensuring long-term functional recovery.