Functional Evaluation of Anterior Cruciate Ligament Reconstruction Using One-Leg Hop Test

Sixty patients, with anterior cruciate ligament (ACL) reconstruction using the iliotibial tract, had their overall knee function assessed at least 2 years postoperatively using the one-leg hop test. For comparison, 30 physically active healthy volunteers with normal knees (15 men and 15 women) and 30 patients with chronic ACL-deficient knees (15 men and 15 women) were also examined. The hop index in the ACL-reconstructed group was significantly improved compared to that of ACL-deficient group, and almost reached the same level as the healthy volunteers. In the ACL-reconstructed group, the hop index gave a good reflection of subjective knee function (IKDC score) and sports level. The results indicated that the one-leg hop test is a useful method for quantitatively evaluating the function of ACL-reconstructed knees.