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. 2012 Jun;24(2):113-9.
doi: 10.5792/ksrr.2012.24.2.113. Epub 2012 May 31.

Correlation between Hamstring Flexor Power Restoration and Functional Performance Test: 2-Year Follow-Up after ACL Reconstruction Using Hamstring Autograft

Min Soo Ko  1 , Sang Jin Yang, Jeong Ku Ha, Jung Yun Choi, Jin Goo Kim
Affiliations

Correlation between Hamstring Flexor Power Restoration and Functional Performance Test: 2-Year Follow-Up after ACL Reconstruction Using Hamstring Autograft

Min Soo Ko et al. Knee Surg Relat Res. 2012 Jun.

Abstract

Purpose: To evaluate the restoration of the flexor power and the correlation between the flexor power and functional performance tests (FPTs) after anterior cruciate ligament (ACL) reconstruction with hamstring autograft.

Materials and methods: Twenty-three men, who underwent ACL reconstruction with hamstring autograft, were evaluated using Lysholm, Subjective IKDC, Tegner activity score, isokinetic flexion and hyperflexion power test, and the FPTs at 1 and 2-year follow-up. We analyzed the mean change from 1 to 2 year and the correlation between both the flexion and hyperflexion power deficit with the FPTs at each follow-up.

Results: Mean age of the patients was 30.9 years (range, 19 to 44). Tegner activity score was significantly increased from 5.7 to 6.3 (p=.010). Hyperflexion power of the involved knee deficits significantly decreased at 2 year follow-up compared with 1 year (p<.001). There was a correlation between the flexor power deficit and the co-contraction, carioca, and involved one-legged hop test at each follow-up. However, no significant correlations were revealed between the hyperflexion power deficit and the FPTs.

Conclusions: Hyperflexion power deficit after ACL reconstruction with the hamstring autograft decreased at 2 year follow-up compared to 1 year and does not affect the results of the FPTs.

Keywords: Anterior cruciate ligament reconstruction; Flexion power; Functional performance test; Hamstring autograft; Hyperflexion.

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Figures

Fig. 1
Fig. 1
(A) Isokinetic flexor test. At 0°-90° with 4 trials in the sitting position. (B) Isokinetic hyperflexion test. At 60°-120° with 4 trials in the prone position.
Fig. 2
Fig. 2
Co-contraction test. Co-contraction test is to step along the half circle line with wearing a rubber strap at the waist with 4 directional changes.
Fig. 3
Fig. 3
Shuttle run test. Shuttle run test is to run for 6.1 m of distance with 3 changes in direction.
Fig. 4
Fig. 4
Carioca test. The Carioca test is run with a cross-over step in the side position for 12 m of distance in each direction.
Fig. 5
Fig. 5
One-leg hop test. One-leg hop test is to jump off for distance with one leg as far as possible and the distance is recorded.
See this image and copyright information in PMC

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