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Journal of the Korean Academy of Rehabilitation Medicine 2001;25(6):1016-1022.
Concentric and Eccentric Isokinetic Trunk Muscle Evaluation in Chronic Low Back Pain.
Shin, Jung Bin , Kim, Sung Woo , You, Sung , Sohn, Hong Seok , Cho, Yoon Soo
1Department of Rehabilitation Medicine, National Health Insurance Corporation Ilsan Hospital, Korea.
2Department of Rehabilitation Medicine, Yonsei University College of Medicine, Korea.
만성 요통 환자에서의 동심성 및 편심성 등속성 운동평가
신정빈, 김성우, 유성1, 손홍석1, 조윤수1
국민건강보험공단 일산병원 재활의학과, 1연세대학교 의과대학 재활의학교실
Abstract

Objective
The purpose of this study is to evaluate concentric and eccentric trunk muscle strength in patients with chronic low back pain and compare it with healthy controls to determine the role of trunk muscle in chronic low back pain


Method
Subjects were 20 chronic low back pain patients with the duration at least 6 months and 20 normal adults. Concentric and eccentric isokinetic trunk muscle test was performed at specific speeds (30o, 60o, 120o/sec) with Cybex 770 machine in back pain patients and healthy control.


Results
The strength of trunk flexor and extensor muscles of chronic low back pain patients was significantly weaker than that of normal controls. Eccentric peak torque was significantly higher than concentric peak torque in both patients and healthy control. A concentric and eccentric ratio of patients was lower than that of normal controls. The correlation between concentric and eccentric variables was high. Our results show that concentric peak torque has the highest correlation with eccentric peak torque.


Conclusion
Isokinetic evaluations of the trunk muscle offer objective and quantitative data of patients with chronic low back pain and will be clinically useful in muscle power measurement of lumbar muscles.

Key Words: Chronic low back pain, Isokinetic strength, Trunk, Concentric, Eccentric


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