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Journal of the Korean Academy of Rehabilitation Medicine 2006;30(5):481-484.
Preferential Vastus Medialis Oblique Activation Achieved by Isokinetic Cycling at High Angular Velocity.
Kim, Hyun Jin , Kwon, Jeong Yi , Kim, Joon Sung , Kim, Min Wook , Bang, Heui Je , Lee, Won Ihl , Ko, Young Jin
1Department of Rehabilitation Medicine, College of Medicine, The Catholic University of Korea. jeongyi@gmail.com
2Department of Physical Medicine & Rehabilitaion, University of Chungbuk College of Medicine, Korea.
고속 등속성 자전거타기 운동에 의한 내측광사근의 차별적 동원
김현진, 권정이, 김준성, 김민욱, 방희제1, 이원일, 고영진
가톨릭대학교 의과대학 재활의학교실, 1충북대학교 의과대학 재활의학교실
Abstract
Objective
Neuromuscular imbalance of vastus medialis obliquus and vastus lateralis muscles is one of the major causes of patellofemoral pain syndrome. This study was designed to evaluate the effect of the angular velocity on the electromyographic activities of vastus medialis obliquus and vastus lateralis during isokinetic cycling.
Method
Fifteen healthy women (23.6⁑2.7 years) without any knee problem performed two sets of isokinetic bicycling using Motomed (RECK, Germany) at three different revolutions per minutes (30 RPM, 45 RPM, 60 RPM). Integrated electromyographic (iEMG) activities of vastus medialis obliquus and vastus lateralis were measured during cycling.
Results
iEMG activities of vastus medialis obliquus increased as angular velocity increased (p<0.05). The vastus medialis obliquus:vastus lateralis iEMG ratio at 60 RPM was significantly greater than the ratio at 30 RPM (p<0.05).
Conclusion
Preferential vastus medialis obliquus activation was achieved by isokinetic cycling at high angular velocity. This suggests the meaningful therapeutic protocol for the patients with patellofemoral pain syndrome in altering neuromuscular imbalance between vastus medialis obliquus and vastus lateralis. (J Korean Acad Rehab Med 2006; 30: 481-484)
Key Words: Patellofemoral pain syndrome, Cycling, Electromyography, Vastus medialis oblique
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