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KMID : 1035420140020010015
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Journal of The Korean Society of Integrative Medicine
2014 Volume.2 No. 1 p.15 ~ p.21
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The Effects of Hip Angle on Muscle Activity of Quadriceps during Q-Setting Exercise
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Lee Keon-Cheol
Kim Jong-Su
Kim Sung-Hun
Kim Myung-Keun
Kim Ji-Won
Chu Seol-Hui
Kim Bo-RA
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Abstract
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Purpose : The aim of this study was to find out differences between muscle activity of quadriceps according to hip angle.
Method : 40 healthy adults produced maximum isometric muscle contraction of quadriceps femoris and each part of the quadriceps femoris were measured with a surface EMG in hip joint angle of 90°, 135°, 180°.
Result : There was no significant difference between muscle activity of vastus medialis and lateralis according to hip angle. But there was significant difference in muscle activity of rectus femoris and the muscle activity was maximum at 135 degrees of hip angle.
Conclusion : In conclusion, maximum muscle activation of rectus femoris is affected by hip angle, and the findings from this study may be helpful for physical therapists in selecting hip position when instructing patients to do Q-setting exercise. So, we suggest that patients perform Q-setting exercise at 135 degrees of hip angle for the best result.
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KEYWORD
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muscle activity, hip angle, quadriceps setting exercise
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