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KMID : 1206220220290030012
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Journal of Korean Academy of Physical Therapy Science
2022 Volume.29 No. 3 p.12 ~ p.20
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Analysis of trunk and lower extremity muscle activity according to the compensation of arm during bridge exercise
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Oh Gku-Bin
Kim Se-Hee
Kim Ye-Eun
An Jun-Sung
You Si-Yeon
Jung Sang-Jin
Cho Ye-Bin
Ju Jin-Han
Cho Ki-Hun
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Abstract
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Background: The purpose of this study was to investigate the changes of trunk and lower extremity muscle activity according to the compensation of arm during bridge movement of healthy subject.
Design: Cross-sectional Study.
Methods: Twenty healthy subjects participated in this study. The subjects performed bridge exercise with 3 different arm positions(arm abduction 45°, 90° and cross-arms) and measured the muscle activity of the trunk and lower extrimity. During bridge exercise with 3 different arm positions, trunk (rectus abdominis, erector spinae) and lower extrimity muscle activity (gluteus medius, biceps femoris, tibialis anterior) were measured using wireless surface EMG.
Results: Rectus abdominis and gluteus medius muscle were most activated during bridge exercise with arm abduction 90° and erector spinae and biceps femoris muscle were most activated during bridge exercise with arm abduction 45°. In addition, tibialis anterior muscle was most activated during bridge exercise with arm cross. However, these difference in muscle activity according to the arm position was not statistically significant.
Conclusion: As a result of this study, we think that the change in arm position does not induce sufficient instability to increase the muscle activity of the trunk and lower extremity muscles. Therefore, various approaches for inducing instability of the support surface for increasing muscle activity when applying bridge movement in clinical practice should be explored.
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KEYWORD
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arm position, bridge exercise, muscle activity
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