논문 상세보기

견관절 외전 각도와 회전 자세에 따른 대흉근 활성도 비교 KCI 등재

Comparison of EMG Activity for Pectoralis Major Muscle During Shoulder Movement With Various Abduction Angle and Rotation Position

  • 언어KOR
  • URLhttps://db.koreascholar.com/Article/Detail/6127
구독 기관 인증 시 무료 이용이 가능합니다. 4,000원
한국전문물리치료학회지 (Physical Therapy Korea)
한국전문물리치료학회 (Korean Research Society of Physical Therapy)
초록

The purpose of this study was to compare EMG activity for pectoralis major muscle during shoulder movement with various abduction angle and rotation position in supine position. Fifteen healthy subjects were recruited for this study. All subjects performed shoulder horizontal adduction holding a 2 kg dumbbell in shoulder abduction 40˚, 70˚, 90˚, 130˚, 160˚ with shoulder neutral, internal rotation (IR), and external rotation (ER). Surface EMG activity was recorded from pectoralis major clavicle part and pectoralis major sternum part for 5 seconds and EMG activity was normalized to the value of maximal voluntary isometric contraction (%MVIC). Dependent variables were examined with 3 (Neutral, IR, ER) 5 (40˚, 70˚, 90˚, 130˚, 160˚) analysis of variance with repeated measures. The EMG activity of pectoralis major muscle was significantly different between shoulder abduction angles and between shoulder rotation positions (p<.05). The highest value of EMG activity of pectoralis major clavicle part among shoulder abduction angles was in 70˚ and, 90˚ in that order. The highest value of EMG activity of pectoralis major sternum part among shoulder abduction angles was in and 130˚, 90˚ in that order. According to the rotation degree, shoulder ER showed the highest value and IR showed the lowest value in both muscle parts. These results suggest that shoulder abduction 70˚, 90˚, 130˚ will be effective during manual muscle testing (MMT) and strengthening exercise for pectoralis major muscle. It is also supposed that shoulder ER is the efficient posture for strengthening of pectoralis major muscle.

저자
  • 정도헌(연세대학교 대학원 재활학과) | Doh-heon Jung
  • 이원휘(연세대학교 대학원 재활학과) | Won-hwee Lee
  • 오재섭(인제대학교 의생명공학대학 물리치료학과) | Jae-seop Oh 통신저자