Comparison of Knee Muscle Strength of Non-injured and Injured Sides following Anterior and Posterior Cruciate Ligament Reconstruction

Abstract

Purpose: The purpose of this study was to compare knee muscle strength of non-injured and injured legs after reconstruction of the anterior cruciate ligament (ACL) and posterior cruciate ligament (PCL). Methods: Thirteen volunteers (males) with anterior ligament injury and 10 volunteers (males) with posterior ligament injury participated in this study. Post reconstruction, the peak torque, total work, and hamstrings to quadriceps (H/Q) ratio were calculated at angular velocities of 60°/sec and 180°/sec in both groups using an isokinetic dynamometer. A t-test was used to compare the mean difference within-group and between-group comparisons. The data were analyzed using SPSS version 18.0 for Windows. Results: In the within-group comparison of muscle strength and muscle endurance in the affected side and unaffected side at angular velocities of 60°/sec and 180°/sec, there was a significant difference in extensor strength in the ACL injury group and a significant difference in flexors and extensor strength in the PCL injury group (p