Effects of Shoulder Horizontal Abduction with Thoracic Extension on Electromyography of Trapezius Muscles

• 발행기관: KEMA학회
• 저자명: Il-Young Yu Min-Hyeok Kang
• 간행물 정보: 『Journal of Musculoskeletal Science and Technology』제9권 제1호, 19~24쪽, 전체 6쪽
• 주제분류: 의약학 > 재활의학
• 파일형태: PDF
• 발행일자: 2025.06.30

국문 초록

Background: Shoulder horizontal abduction exercise is a common exercise for promoting lower trapezius muscle activity. However, studies on the effectiveness of shoulder horizontal abduction exercises performed in various positions are lacking. Purpose: This study aimed to verify the effect of shoulder horizontal abduction exercise with thoracic extension performed in the prone and sitting positions on upper and lower trapezius muscle activity. Study design: Case series study Methods: A total of 12 healthy adults without shoulder pain performed prone shoulder horizontal abduction, prone shoulder horizontal abduction with thoracic extension, and sitting shoulder horizontal abduction with thoracic extension. Upper and lower trapezius muscle activity during each shoulder horizontal abduction exercise was measured using surface electromyography. Results: Upper trapezius muscle activity was lowest during sitting shoulder horizontal abduction with thoracic extension compared to prone shoulder horizontal abduction with and without thoracic extension, whereas lower trapezius muscle activity was highest during prone shoulder horizontal abduction with thoracic extension compared to prone shoulder horizontal abduction and sitting shoulder horizontal abduction with thoracic extension. The upper trapezius/lower trapezius muscle activity ratio did not differ between exercises. Conclusions: The findings indicate that considering various exercise positions based on the purpose of the shoulder horizontal abduction exercise is necessary.

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INTRODUCTION

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키워드

Electromyography Lower trapezius Shoulder horizontal abduction Upper trapezius