엎드린 자세에서 어깨 폄 운동 시 목과 어깨 돌림 위치에 따른 등세모근 근활성도 비교
Comparison of Trapezius Muscle Activation According to Neck and Shoulder Rotational Positions During Prone Shoulder Extension Exercises
Background: Prone shoulder extension exercises are commonly used to strengthen the scapular stabilizers, particularly the trapezius muscle. While previous studies have examined the effects of shoulder abduction angle and rotation alone, the combined influence of cervical and glenohumeral rotations on activation of the upper (UT), middle (MT), and lower trapezius (LT) remains unclear. Clarifying these interactions is essential for optimizing rehabilitation programs that target specific trapezius subregions through muscle length–tension modulation. Methods: Twelve healthy male adults performed nine variations of prone shoulder extension combining three neck positions with three shoulder rotations. Surface electromyography recorded trapezius activity, normalized to %MVIC. Each condition was held briefly and repeated with adequate rest to minimize fatigue. Repeated‑measures ANOVA and Bonferroni post‑hoc tests were used to compare activation across conditions (α = .05). Results: Upper trapezius activation was significantly higher in the neck contralateral rotation with shoulder external rotation position compared to the neck ipsilateral rotation with shoulder internal rotation position (p<.05). No significant differences were observed in middle trapezius activation across all exercise variations (p>.05). Lower trapezius activation was significantly higher in the neck neutral with shoulder neutral position compared to the neck ipsilateral rotation with shoulder internal rotation position (p<.05). Conclusion: Cervical and shoulder rotations distinctly modulate UT activation via alterations in muscle length, whereas MT remains stable and LT shows selective sensitivity under fully neutral positioning. These findings highlight the importance of considering coupled neck–shoulder kinematics to selectively target trapezius subregions in rehabilitation, and suggest that incorporating trunk rotation warrants further investigation for MT and LT modulation.
목차
ABSTRACT I. 서론 Ⅱ. 연구 방법 1. 연구대상자 2. 실험도구 3. 최대 수의적 등척성 수축 4. 운동 방법 5. 자료 처리 Ⅲ. 연구 결과 1. 등세모근 근활성도 Ⅳ. 고찰 Ⅴ. 결론 참고문헌
대한정형도수물리치료학회 [Korean Academy of Orthopedic Manual Therapy]
설립연도
1992
분야
의약학>물리치료학
소개
대한정형물리치료학회는 대한물리치료사학회 정형물리치료 분과학회로서 정형물리치료학 분야의 연구및 학문발전에 목적을 가지고 있습니다.
본 학회에서는 다음과 같은 사업을 주관하고 있습니다.
첫째. 정형물리치료 분야 및 관련분야의 연구가 이루어지고 있으며,
둘째. 정형물리치료 연수위원회 운영 및 교육프로그램을 개발하고,
셋째. 학술대회 및 세미나를 개최하며,
넷째. 학회지 및 관련 도서를 발간 하고 있으며,
다섯째. 국제 및 국내 유관단체와 학술교류를 담당하고 있습니다.
간행물
간행물명
대한정형도수물리치료학회지 [The Journal of Korean Academy of Orthopedic Manual Physical Therapy]