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KMID : 0950020050310010001
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Journal of Health Science & Medical Technology
2005 Volume.31 No. 1 p.1 ~ p.7
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Isotonic Strength Evaluation of the Hamstring Muscles as the Change of Hip Joint Angle in Prone Position
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Lee Jae-Hak
Ham Young-Woon
Yoon Bum-Chul
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Abstract
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Since isotonic exercise equipment can give an evaluation of muscle strength with great accuracy and objectivity, it is widely used as the one of the important methods for evaluation of muscle performance. The purpose of this study were to measure concentric and eccentric muscle strength of the Hamstring muscles as the change of hip angle in dominant. Concentric and eccentric muscle strength was assessed by monitoring peak power, average peak power, average power, peak velocity, average peak velocity, peak force, average peak fore, and total work for the Hamstring muscles using the EN-TreeM isotonic dynamometer. For this thirty healthy males performed knee motion at 74.89% of their 1 RM with 45° and 0° flexion fo their hip angle. The results were as follow : 1. The peak power, average peak power, peak force and average peak force of concentric contraction at 0° of the hip joint angle were greater than those at 45° of the hip joint angle. 2. The peak power, average peak power, peak force and average peak force of eccentric contraction at 45° of the hip joint angle were greater than those at 0° of the hip joint angle. 3. The average power and total work of concentric and eccentric contraction at 45° of the hip joint angle were greater than those at 0° of the hip joint angle.
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KEYWORD
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Concentric and eccentric muscle strength, EN-TreeM isotonic dynamometer
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