지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록· 키워드
오류제보하기
Background: Secondary impingement can be caused by an imbalance in the force couple or co-activation of the deltoid and rotator cuff, as well as by an imbalance in the scapular upward rotators. Purpose: The purpose of this study was to evaluate the effects of humeral position and shoulder flexion angle on the activity of the scapular upward rotators, infraspinatus, and deltoid during arm elevation. Study design: Cross-sectional comparative study. Methods: Twenty-three healthy participants were included in this study. Electromyography (EMG) electrodes were attached to the upper trapezius, lower trapezius, serratus anterior, infraspinatus, anterior deltoid, and middle deltoid. The participants were seated on a chair with no arm rest and instructed to maintain the trunk in an upright position. They were then asked to elevate the arm until it reached a bar set at 90 degrees and 120 degrees elevation. The movement was performed in the scapular plane to ensure shoulder joint stability. Participants were then asked to grasp a 2-kg dumbbell and maintain arm elevation for 5 seconds in the palm-down, neutral, and palm-up position. Muscle activity was measured during maximal voluntary isometric contraction (MVIC), and %MVIC values were obtained. Two-way repeated-measured analysis of variance was used for the analysis; when significant differences were found in the %MVIC values of each muscle according to the arm elevation position, post hoc paired-sample t-test with Bonferroni correction were performed. Results: The EMG activity of the upper trapezius, lower trapezius, serratus anterior, infraspinatus, anterior deltoid, and middle deltoid varied significantly according to the shoulder flexion angle (all p<0.05) and according to the humeral position (all p<0.05) in all muscles except the lower trapezius. Conclusions: We recommend that consideration be given to the humeral position and shoulder flexion angle during the performance of strengthening exercises for the scapular upward rotators and shoulder external rotators.
목차
등록된 정보가 없습니다.
참고문헌 (38)
참고문헌 신청
Neer CS / 1972 / Anterior acromioplasty for the chronic im-pingement syndrome in the shoulder : a preliminary report / JBJS 54(1):41~50
Hallström E / 2006 / Shoulder kinematics in 25 patients with impingement and 12 controls / Clin Orthop Relat R 448:22~27
Ludewig PM / 2002 / Translations of the humerus in persons with shoulder impingement symptoms / J Orthop Sports Phys Ther 32(6):248~259
McClure PW / 2006 / Shoulder function and 3-dimensional scapular kinematics in people with and without shoulder impingement syndrome / Phys Ther 86(8):1075~1090
Myers JB / 2003 / Shoulder muscle coactivation alterations in patients with subacro-mial impingement / Med Sci in Sports Exerc 35:S346
Hallström E / 2006 / Shoulder kinematics in 25 patients with impingement and 12 controls / Clin Orthop Relat R 448:22~27
Ludewig PM / 2002 / Translations of the humerus in persons with shoulder impingement symptoms / J Orthop Sports Phys Ther 32(6):248~259
McClure PW / 2006 / Shoulder function and 3-dimensional scapular kinematics in people with and without shoulder impingement syndrome / Phys Ther 86(8):1075~1090
Myers JB / 2003 / Shoulder muscle coactivation alterations in patients with subacro-mial impingement / Med Sci in Sports Exerc 35:S346
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