Simple measurements in assessing muscle performance after an ACL reconstruction

International Journal of Sports Medicine
T JärveläM Järvinen

Abstract

The purpose of this study was to evaluate the validity of the simple measurements of the muscle performance of the lower extremity, one legged hop testing for distance and the measurement of the circumference of the thigh 15 cm proximal to the joint line, by comparing them to the isokinetic strength testing 5 to 9 years after an ACL reconstruction with a bone-patellar tendon-bone (BTB) autograft. The measurements were performed on 86 patients on average 7 years after the surgery. The clinical evaluation was performed using the standard knee ligament evaluation form of the International Knee Documentation Committee (IKDC) and the Lysholm and the Marshall knee scores. At seven years, the isokinetic mean strength deficit of knee extension at the 60 degrees per second was 10 % in the operated limb as compared to the contralateral limb (NS). In the knee flexion, the differences were even smaller and statistically not significant either. The strength deficit of the knee extension at all knee angle velocities (p < 0.005), and flexion at 60 degrees per second (p < 0.05), correlated to the one legged hop testing, so that the patients with the greatest strength deficit also had the worst outcome in the one legged hop test. Also, the corr...Continue Reading

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