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KMID : 0608320140210020048
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Physical Therapy Korea
2014 Volume.21 No. 2 p.48 ~ p.56
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Effect of Craniocervical Flexion on Muscle Activities of Scapula Upward Rotator Muscle During Push-Up Plus Exercise in Subject With Winging of Scapula
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Song Si-Jeong
Lim One-Bin
Kim Jeong-Ah
Yong Joon-Hyoung
Cynn Heon-seock
Yi Chung-Hwi
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Abstract
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The aim of this study to investigate the effects of craniocervical flexion on muscle activities of scapular upward rotators during push-up plus exercise in subjects with winging scapula. Eighteen males with scapular winging were recruited, and each subject performed knee push-up plus and other exercises, in two conditions (craniocervical flexion vs. natural head positions). A surface electromyography (EMG) was used to measure upper trapezius (UT), serratus anterior (SA), and lower trapezius (LT) muscle activity. A paired t-test was used to determine the statistical significance between the different condition with/without applying of craniocervical flexion. UT EMG activity significantly decreased and SA EMG activity significantly increased during knee push-up plus involving the craniocervical flexion compared to the natural head position. However, no significant differences (p>.05) were found in the activity of the LT muscle. The UT/SA ratios with and without craniocervical flexion showed a significant difference (p<.05). These results showed that the knee push-up plus other exercises performed with craniocervical flexion could strengthen the serratus anterior muscle and minimize the activity of the UT muscle.
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KEYWORD
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Craniocervical flexion, Head position, Push up plus, Scapular upward rotator, Scapular winging
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