Earticle

초록

영어

Background: The shoulder functions as a critical biomechanical link between the upper extremity and the trunk, providing both mobility and stability necessary for efficient functional movement. Adequate trunk stability is essential for optimal force transmission and coordinated muscle activation within the shoulder complex. Deficits in trunk stability may disrupt normal neuromuscular control, leading to altered activation patterns of scapular and glenohumeral muscles, reduced strength output, and the development of compensatory movement strategies. Despite its clinical importance, the influence of external trunk stabilization on shoulder muscle performance has not been fully clarified. Therefore, this study aimed to investigate the effects of different external trunk compression conditions on isometric shoulder rotator strength and scapular muscle activity in healthy young adults, with the goal of identifying the most effective trunk compression site. Methods: Twenty-eight healthy adults in their twenties voluntarily participated in this study. Isometric shoulder internal and external rotation strength was assessed under three experimental conditions: no trunk compression, pelvic compression only, and combined thoracic and pelvic compression. Surface electromyography was used to measure muscle activity of the upper trapezius, lower trapezius, serratus anterior, and middle deltoid during standardized isometric tasks. All measurements were performed in a controlled laboratory setting, and data were analyzed to compare differences across conditions. Results: Isometric shoulder internal and external rotational strength significantly increased with greater levels of external trunk support. Electromyographic analysis revealed significant differences in muscle activation among the three compression conditions (p < .01). Specifically, scapular stabilizing muscles demonstrated progressively increased activation as the number of compression sites increased, indicating enhanced neuromuscular engagement. Conclusion: External trunk compression effectively enhances shoulder rotational strength and facilitates increased activation of scapular stabilizing muscles. These findings suggest that improving trunk stability may optimize shoulder function during isometric tasks. Incorporating trunk stabilization strategies into rehabilitation programs may be beneficial for individuals with shoulder dysfunction, potentially improving clinical outcomes and functional performance.

목차

ABSTRACT
Ⅰ. 서론
Ⅱ. 연구방법
1. 연구대상자
2. 연구 절차
3. 측정 도구 및 측정 방법
4. 분석 방법
Ⅲ. 연구결과
1. 연구대상자의 일반적인 특성
2. 외적 몸통 압박 위치에 따른 어깨 등척성 돌림근 근력 비교
3. 어깨 등척성 안쪽돌림 시 외적 몸통 압박 위치에 따른 어깨뼈 주위근의 근활성도 비교
4. 어깨 등척성 가쪽돌림 시 외적 몸통 압박 위치에 따른 어깨뼈 주위근의 근활성도 비교
Ⅳ. 고찰
Ⅴ. 결론
참고문헌

키워드

저자

• 어채원 [ Chae-won Eo | 대전대학교 보건의료대학원 물리치료학과 대학원생 ]
• 김선엽 [ Suhn-yeop Kim | 대전대학교 보건의료과학대학 물리치료학과 교수 ] 교신저자

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  대한정형도수물리치료학회지 [The Journal of Korean Academy of Orthopedic Manual Physical Therapy]

• 간기

  연3회

• pISSN

  1226-3680

• eISSN

  2508-7282

• 수록기간

  1995~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 512 DDC 615