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KMID : 1206220170240010014
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Journal of Korean Academy of Physical Therapy Science
2017 Volume.24 No. 1 p.14 ~ p.21
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The Comparison of Muscle Activity in 4 Sections of Rectus Abdominis by The Distance of The Shoulder Width and The Angle of The Elbow Joint in The Position of Push-Up
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Moon Kyo-Hoon
Kim Kyung-Hun
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Abstract
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Background; This study was to investigate effects of distance of muscle activity of 4 sections of rectus abdominis(RS-RA,
LS-RA, RI-RA, LI-RA) by the shoulder width(x0.5, x1.0, x1.5) and the angle of the elbow joint(0°, 45°, 90°)
Method : This study was conducted on 20 healthy male and 20 female adult. respectively, elbow joints were maintained at 0 °, 45 °, and 90 ° flex postures on The shoulder width is 0.5, 1.0, and 1.5 times. at the same time 4 sections of rectus abdominis were measured using EMG with maintaining isometric contraction of the rectus abdominis for 5 seconds.
Results; The results were as follows: First, muscle activity of 4 sections of rectus abdominis(RS-RA, LS-RA, RI-RA, LI-RA) by angle of the elbow joint(0°, 45°, 90°) was a statistically significant(p<0.05), Second, muscle activity of 4 sections of rectus abdominis(RS-RA, LS-RA, RI-RA, LI-RA) by the shoulder width(x0.5, x1.0, x1.5) was a statistically non-significant
Conclusion; It was found to be most effective to perform arm posture with rectus abdominis muscle strength exercise.
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KEYWORD
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EMG , Rectus Abdominis , Push up
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