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Role of flexors in knee stability
1School of Physical Therapy, College of Medicine, Department of Orthopedic Surgery, National Taiwan University, Taipei, ROC.
Summary
Strengthening knee flexor explosiveness is crucial for anterior cruciate ligament (ACL) reconstruction recovery. This enhances dynamic knee stability and improves overall motor function post-surgery.
Area of Science:
- Orthopedics
- Sports Medicine
- Rehabilitation Science
Background:
- Knee extensor strength is a common metric for functional recovery after anterior cruciate ligament (ACL) reconstruction.
- Knee flexors act as dynamic stabilizers, crucial for preventing tibial anterior displacement and reinforcing ACL function.
Purpose of the Study:
- To investigate the correlation between knee flexor performance (measured by isokinetic dynamometry) and clinical assessments in ACL reconstructed patients.
- To compare knee flexor performance and clinical outcomes between ACL patients and healthy controls.
Main Methods:
- Included 10 patients 3-5 years post-ACL reconstruction and 15 healthy controls.
- Assessed knee flexor performance using isokinetic dynamometry.
- Conducted clinical evaluations: KT-1000 stability tests, shuttle run tests, thigh/calf circumference, and knee range of motion.
Main Results:
- ACL patients exhibited significantly greater knee laxity than controls under passive anterior force.
- No significant difference in shuttle run times between groups, but a positive correlation between shuttle run time and knee laxity was observed.
- Positive correlations found between KT-1000 arthrometry results and knee flexor torque acceleration energy and average power.
Conclusions:
- Physical therapy post-ACL reconstruction should prioritize enhancing knee flexor explosiveness.
- Improved knee flexor power can contribute to better dynamic knee joint stability and motor performance in ACL patients.