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Knee Surg Relat Res. 2012 Mar;24(1):40-5. doi: 10.5792/ksrr.2012.24.1.40. Epub 2012 Feb 28.

Validation of functional performance tests after anterior cruciate ligament reconstruction.

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Sports Medicine Research Institutey, Inje University Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea.



To validate the functional performance tests (FPTs) after anterior cruciate ligament (ACL) reconstruction.


Thirty men in their third decade after ACL reconstruction at 6 month follow-up and thirty healthy subjects were selected. Lysholm knee score, International Knee Documentation Committee (IKDC) subjective score, Tegner activity score, KT-2000 arthrometer test, isokinetic strength test, functional performance tests (one leg hop test, co-contraction test, shuttle run test, carioca test) were performed in two groups. We evaluated the test-retest reliability of FPTs in healthy group and the between FPTs and other parameters in ACL reconstruction group.


The test-retest result showed high correlation in co-contraction test (r=0.511), shuttle run test (r=0.746), carioca test (r=0.742). In the ACL reconstruction group, the IKDC score, Tegner activity score, extensor power at 60°/s, and one leg hop test also showed high correlation between each test.


The three FPTs showed correlations with the established methods for determining return to sports activities after ACL reconstruction and had high test-retest reliability. Therefore we believe the three FPTs can be useful methods to assess knee function in athletes after ACL reconstruction.


Anterior cruciate ligament; Functional performance test; Reconstruction

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