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タイトル: | Effect of different trunk postures on scapular muscle activities and kinematics during shoulder external rotation |
著者: | Miyakoshi, Kosuke Umehara, Jun Komamura, Tomohito Ueda, Yasuyuki Tamezawa, Toru Kitamura, Gakuto Ichihashi, Noriaki https://orcid.org/0000-0003-2508-2172 (unconfirmed) |
著者名の別形: | 宮腰, 晃輔 梅原, 潤 駒村, 智史 上田, 泰之 爲沢, 透 北村, 岳斗 市橋, 則明 |
キーワード: | Scapula muscle activity kinematics trunk posture shoulder external rotation exercise |
発行日: | Dec-2019 |
出版者: | Elsevier BV |
誌名: | Journal of Shoulder and Elbow Surgery |
巻: | 28 |
号: | 12 |
開始ページ: | 2438 |
終了ページ: | 2446 |
抄録: | [Background]Shoulder external rotation at abduction (ER) is a notable motion in overhead sports because it could cause strong stress to the elbow and shoulder joint. However, no study has comprehensively investigated the effect of different trunk postures during ER. This study aimed to investigate the effect of different trunk postures on scapular kinematics and muscle activities during ER. [Methods]Fourteen healthy men performed active shoulder external rotation at 90° of abduction with the dominant arm in 15 trunk postures. At maximum shoulder external rotation in 15 trunk postures, including 4 flexion-extension, 6 trunk rotation, and 4 trunk side-bending postures, as well as upright posture as a control, scapular muscle activities and kinematics were recorded using surface electromyography and an electromagnetic tracking device, respectively. The data obtained in the flexion-extension, trunk rotation, and trunk side-bending postures were compared with those obtained in the upright posture. [Results]In the flexion-extension condition, scapular posterior tilt and external rotation significantly decreased, but the muscle activities of the lower trapezius and infraspinatus significantly increased in maximum trunk flexion. Moreover, scapular upward rotation and the activity of the serratus anterior significantly increased in maximum trunk extension. In the rotation condition, scapular posterior tilt and external rotation significantly decreased, but the activity of the serratus anterior significantly increased in the maximum contralateral trunk rotation posture. In the trunk side-bending condition, scapular posterior tilt and the external rotation angle significantly decreased. [Conclusio]Trunk postures affected scapular kinematics and muscle activities during ER. Our results suggest that different trunk postures activate the lower trapezius and serratus anterior, which induce scapular posterior tilt. |
著作権等: | © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ The full-text file will be made open to the public on 1 December 2020 in accordance with publisher's 'Terms and Conditions for Self-Archiving' この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/244811 |
DOI(出版社版): | 10.1016/j.jse.2019.04.059 |
PubMed ID: | 31409561 |
出現コレクション: | 学術雑誌掲載論文等 |
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