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KMID : 1035420210090010173
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Journal of The Korean Society of Integrative Medicine
2021 Volume.9 No. 1 p.173 ~ p.181
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The Effect of the Muscle Energy Technique on the Muscle Activity of the Cervical Flexor and Extensor Muscles of the Forward Head Posture
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Kim Hyeon-Su
Lee Keon-Cheol
Kim Dae-Jin
Ahn Jeong-Hoon
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Abstract
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Purpose : The purpose of this study was to compare the Post isometric relaxation (PIR) technique with the Reciprocal inhibition (RI) technique. The results of applying PIR and RI to the muscles of the hamstring showed that the PIR technique was effective. The purpose of this study is to investigate whether PIR technique is more effective than RI technique by comparing muscle activity and pain through posture improvement.
Methods : The muscle activity was measured using EMG after applying the PIR and RI techniques to 30 adults at K College. Subjects were selected for forward head posture whose ear center was 2.5 ㎝ front of the center of the shoulder. EMG equipment was used to measure muscle activity, and the measurement sites were measured in cervical flexor and extensor muscles. The experiment period was performed once a week for a total of two weeks, and after the pre-measurement was performed for 5 minutes PIR and RI exercise. In the PIR technique, the head is tilted back in a sitting position, and the experimenter applies resistance with the same force for 7-10 seconds and repeats 3-5 times after rest. In the RI technique, in a sitting position, the subject gives the force to bend the head forward, and the experimenter applies resistance with the same force for 7 to 10 seconds, and repeats 3 to 5 times after rest.
Results : The result is same as the following. There was a significant difference in muscle activity before and after exercise in PIR and RI. In PIR and RI application, PIR group was significantly decreased in the left neck muscle and right neck muscle at week 1.
Conclusion : There were significant differences in both PIR and RI technique. In particular, the PIR technique was more effective than the RI technique for the neck muscle at week 1, and it was not significant at week 2, but muscle activity was decreased when PIR and RI were applied. In the future, it is necessary to supplement these points and to study patients who maintain unnecessary muscle tone due to posture in clinical practice.
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KEYWORD
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neck muscle, forward head posture, MET, muscle activity
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