한국전문물리치료학회지 (Physical Therapy Korea)

  • 제17권4호
  • /
  • Pages.8-15
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  • 2010
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  • 1225-8962(pISSN)
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  • 2287-982X(eISSN)
한국전문물리치료학회 (Korean Research Society of Physical Therapy)
권호 표지

Effects of Hand Positions on Electromyographic Activity in Scapulothoracic Muscles During Push-Up Plus

  • Yoon, Ji-Yeon (Motion Analysis Laboratory, Haeundae Paik Hospital, Inje University) ;
  • Kim, Tae-Hoon (Dept. of Occupational Therapy, Kaya University) ;
  • Oh, Jae-Seop (Dept. of Physical Therapy, College of Biomedical Science and Engineering, Inje University)
  • 투고 : 2010.09.29
  • 심사 : 2010.11.02
  • 발행 : 2010.11.19
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초록

This study was designed to investigate the effect of different hand positions on scapulothorcic muscle activities during push-up plus exercises. Fourteen healthy males performed push-up plus exercises under three conditions (neutral, $90^{\circ}$ internally rotated, and $90^{\circ}$ externally rotated hand positions), during which the activities of the serratus anterior, pectoralis major, and upper trapezius muscles were recorded using surface electromyography. The statistical significance at three different hand positions was tested by repeated one-way ANOVA. The mean activities of the serratus anterior increased and the mean activities of the pectoralis major decreased in the order of neutral hand position, internally rotated hand position, and externally rotated hand position. There was a significant difference during push-up plus between neutral and externally rotated hand positions as well as in the serratus anterior/pectoralis major activity ratio (p<.0.5). However, no significant differences were found in the activity of the upper trapezius muscle or the serratus anterior/upper trapezius activity ratio. We suggest that the push-up plus exercise performed in the externally rotated hand position could a beneficial strategy for selective strengthening of the serratus anterior muscle, while minimizing the activity of the pectoralis major muscle.

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참고문헌

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