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KMID : 1211620160110020071
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Journal of the Korean Society of Physical Medicine
2016 Volume.11 No. 2 p.71 ~ p.76
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Deltoid Middle Fiber of the Isometric Contraction According to Elastic Band and Dumbbell on Various Shoulder Abduction Angle
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Park Min-Chull
Lee Sang-Yeol
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Abstract
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PURPOSE: The purpose of this study was to compare isometric contraction of deltoid middle fiber between elastic band and light dumbbell on various shoulder abduction angle. And this study intends to examine the compare with isometric contraction on deltoid middle fiber in various abduction angle of shoulder joint.
METHODS: The participants of this study were Korean healthy adult in their 20s (n=60). The 8 channel surface electromyography was used to measure activity of the deltoid middle fiber at isomeric contraction on various abduction angle: 0°, 30°, 60°, 90°, 120° of shoulder joint using elastic band: red color Theraband and dumbbell: 2㎏. The data used in the analysis of the present study was the root mean square.
RESULTS: The deltoid middle fiber activation was not significantly different between elastic band and dumbbell at each abduction angle. The deltoid middle fiber activation significantly increased as more to increased shoulder abduction angle in elastic band and dumbbell.
CONCLUSION: The elastic band and dumbbell was to provide the similarly load to the deltoid middle fiber isometric contraction on all of the shoulder abduction angle. The deltoid middle fiber activation increased as more to increased shoulder abduction angle in elastic band and dumbbell. These results may be an important reference in development of exercise on shoulder joint.
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KEYWORD
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Dumbbell, Deltoid middle fiber, Elastic band, Shoulder abduction
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