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KMID : 1035420190070020039
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Journal of The Korean Society of Integrative Medicine
2019 Volume.7 No. 2 p.39 ~ p.47
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The Effects of Vibration on Shoulder Stabilizer Muscle Activation and Scapular Winging Length of Knee Push-up Plus Exercise in Adults with Scapular Winging
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Park Won-Young
Koo Hyun-Mo
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Abstract
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Purpose : This study was investigated effects of vibration to scapular winging during knee push-up plus exercise.
Methods : Twenty-eight female subjects with scapular winging were evaluated performing knee push-up plus exercise with or without vibration three times a week for four weeks. Muscle activation of the serratus anterior, upper trapezius, ratio of activation of the upper trapezius to serratus anterior were measured by using surface EMG and scapular winging length was measured by using the caliper.
Results : The findings revealed that after knee push-up plus exercise -with and without- vibration induced a significant increase in muscle activation of serratus anterior (p<.05) and significant decrease in muscle activation of upper trapezius (p<.05), ratio of muscle activation of the upper trapezius to serratus anterior (p<.05) and scapular winging length (p<.05). Also, there was a significant difference in muscle activation of serratus anterior (p<.05) and upper trapezius (p<.05) between control group and experimental group at post-test.
Conclusion : This study suggests positive clinical effects of knee push-up plus exercise with vibration which enhanced muscle activation of serratus anterior and reduced muscle activation of upper trapezius in person with scapular winging. However, vibration had no effectiveness to improve muscle imbalance between serratus anterior and upper trapezius, and reduce the scapular winging length.
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KEYWORD
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scapular winging, shoulder stabilizer muscle, knee push-up plus, vibration
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