The Effect of Applying the Muscle Energy Technique to Neck Muscles on the Forward Head Posture

목 근육에 대한 근에너지기법 적용이 전방머리자세에 미치는 영향

  • Kim, Hyeon-Su (Dept. of Physical Therapy, Kyungnam College of Information & Technology) ;
  • Lee, Keon-Cheol (Dept. of Physical Therapy, Kyungnam College of Information & Technology) ;
  • Kim, Dae-Jin (Dept. of Physical Therapy, 365Haha Hospital) ;
  • Ahn, Jeong-Hoon (Dept. of Physical Therapy, Manse365 Hospital)
  • 김현수 (경남정보대학교 물리치료과) ;
  • 이건철 (경남정보대학교 물리치료과) ;
  • 김대진 (365 하하병원 물리치료실) ;
  • 안정훈 (만세 365 병원)
  • Received : 2021.01.22
  • Accepted : 2021.02.10
  • Published : 2021.02.28


Purpose : The purpose of this study is to compare muscle activity after applying two muscle energy techniques (MET) to subjects with forward head posture to see if the post isometric relaxation (PIR) technique is more effective than the reciprocal inhibition (RI) technique. 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. In the comparison of muscle activity, there was a significant decrease in both PIR and RI at 1 and 2 weeks. And there was a greater decrease in muscle activity in PIR. There was no difference in the comparison of decrease in muscle activity at 1 week and 2 week. Conclusion : Both PRI and RI can be said to be effective in improving the function of the forward head posture in the neck muscles. Therefore, the selection of the two techniques in clinical practice should be appropriately performed under the judgment of experts according to the patient's situation.


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