견관절 외전 각도와 회전 자세에 따른 대흉근 활성도 비교
Comparison of EMG Activity for Pectoralis Major Muscle During Shoulder Movement With Various Abduction Angle and Rotation Position
1
조회
0
다운로드
3
인용
0
참고문헌
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 ㎏ 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 130° and, 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.
Abstract
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 ㎏ 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 130° and, 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.
참고문헌 (20)
- Clarkson HM, "Musculoskeletal Assessment: Joint range of motion and manual muscle strength. 2 ed" (2000), Lippincott Williams & Wilkins
- Cram JR, "Introduction to Surface Electromyography" (1998), Aspen Pub
- Cordasco FA, "An electromyographic analysis of the shoulder during a medicine ball rehabilitation program", Am J Sports Med., 24(3), pp.386~392 (1996)
- Dark A, "Shoulder muscle recruitment patterns during commonly used rotator cuff exercises: An electromyographic study", Phys Ther., 87(8), pp.1039~1046 (2007)
- David G, "Emg and strength correlates of selected shoulder muscles during rotations of the glenohumeral joint", Clin Biomech (Bristol, Avon)., 15(2), pp.95~102 (2000)
- DiGiovine NM, "An electromyographic analysis of the upper extremity in pitching", Journal of Shoulder and Elbow Surgery, 1(1), pp.15~25 (1992)
- Glousman R, "Dynamic electromyographic analysis of the throwing shoulder with glenohumeral instability", J Bone Joint Surg Am., 70(2), pp.220~226 (1998)
- Jenkins DB, "Hollinshead's Functional Anatomy of the Limbs and Back. 9th ed" (2008), Saunders Co
- Jobe FW, "Rotator cuff function during a golf swing", Am J Sports Med., 14(5), pp.388~392 (1986)
- Kendall F, "Muscles Testing and Function With Posture and Pain. 5 ed" (2005), Lippincott Williams & Wilkins
- Kinney E, "Activation of the trapezius muscle during varied forms of kendall exercises", Phys Ther Sport., 9(1), pp.3~8 (2008)
- Kisner C, "Therapeutic Exercise: Foundation and techniques. 5th ed" (2007), PA, F.A. Davis Co
- Kronberg M, "Muscle activity and coordination in the normal shoulder. An electromyographic study", Clin Orthop Relat Res., 257, pp.76~85 (1990)
- Neumann DA, "Kinesiology of the Musculoskeletal System: Foundations for physical rehabilitation. 1st ed. St" (2002), Mosby
- Pink M, "The normal shoulder during freestyle swimming. An electromyographic and cinematographic analysis of twelve muscles", Am J Sports Med., 19(6), pp.569~576 (1991)
- Pochini Ade C, "Pectoralis major muscle rupture in athletes: A prospective study", Am J Sports Med., 38(1), pp.92~98 (2010)
- Ryu RK, "An electromyographic analysis of shoulder function in tennis players", Am J Sports Med., 16(5), pp.481~485 (1988)
- Sahrmann SA, "Diagnosis and Treatment of Movement Impairment Syndromes" (2001), Mosby
- Scovazzo ML, "The painful shoulder during freestyle swimming. An electromyographic cinematographic analysis of twelve muscles", Am J Sports Med., 19(6), pp.577~582 (1991)
- Wickham J, "Quantifying ‘normal' shoulder muscle activity during abduction", J Electromyogr Kinesiol, 20(2), pp.212~222 (2010)