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Asian J Kinesiol > Volume 17(3); 2015 > Article
The Official Journal of the Korean Academy of Kinesiology 2015;17(3):25-34.
DOI: https://doi.org/10.15758/jkak.2015.17.3.25    Published online August 31, 2015.
Effects of Muscle Deficit of Knee Extension Angle 30° on Knee Functional Scores following Anterior Cruciate Ligament Reconstruction.
Ho-Ju Ahn, Hyun-Sik Jeon, Keun-Ok An, Hyun-Joo Kang, Ho-Seong Lee
Dankook University
Soonchunhyang university
Correspondence:  Ho-Seong Lee,
Email: hoseh28@dankook.ac.kr
Received: 29 May 2015   • Accepted: 14 August 2015
Abstract
PURPOSE
The purpose of this study was to investigate the effects of muscle deficit of knee extension angle 30° on knee functional scores following anterior cruciate ligament reconstruction.
METHODS
The patients who had less than 20% of peak torque value following reconstructive ACL operation were participated in this study. In addition, they were divided into a group with knee extension angle 30° muscle deficit less than 20% (Control group; CON, n = 15) and into a group with knee extension angle 30° muscle deficit more than 20% (Muscle deficit group; MDG, n = 15). Knee extension angle 30° muscle deficit, IKDC and Lysholm scores were measured in knee extension angle 30°.
RESULTS
Knee extension angle 30° muscle deficit was significantly higher in the MDG compared with CON (p<.001). IKDC and Lysholm scores were significantly lower in the MDG compared with CON (p<.001).
CONCLUSIONS
This study demonstrated that a larger knee extension angle 30° muscle deficit following reconstructive ACL operation reduces IKDC and Lysholm scores. Therefore, it is recommended that knee extension angle 30° muscle deficit should be considered for rehabilitation and return to sports after ACL reconstruction.
Keywords: anterior cruciate ligament, isokinetic test, peak torque value, muscle deficit, knee functional score


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