Selective Activation of Serratus Anterior Using Electromyography Biofeedback During Push-Up Plus

푸시업플러스 시 근전도 바이오피드백을 이용한 전거근의 선택적 강화

  • Jeon, Yong-Jin (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University) ;
  • Choung, Sung-Dae (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University) ;
  • Kim, Si-Hyun (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University) ;
  • Cynn, Heon-Seock (Dept. of Physical Therapy, College of Health Science, Yonsei University, Dept. of Ergonomic Therapy, The Graduate School of Health and Environment, Yonsei University)
  • 전용진 (연세대학교 대학원 재활학과) ;
  • 정성대 (연세대학교 대학원 재활학과) ;
  • 김시현 (연세대학교 대학원 재활학과) ;
  • 신헌석 (연세대학교 보건과학대학 물리치료학과, 보건환경대학원 인간공학치료학과)
  • Received : 2010.08.31
  • Accepted : 2010.09.29
  • Published : 2011.02.19


Push-up plus has been advocated for increasing the activity of the serratus anterior muscle, the most critical scapular stabilizer. However, no previous study has reported the possibility of compensatory motion on the part of the pectoralis major, which could substitute for the action of the serratus anterior during push-up plus. The aim of the current study was to investigate the immediate effect of electromyography (EMG) biofeedback of the pectoralis major muscle on the pectoralis major, upper trapezius, and serratus anterior muscles during push-up plus. Fourteen healthy young subjects voluntarily participated in this study; each subject performed push-up plus from the quadruped position, in two conditions (i.e., with or without visual and auditory biofeedback). Surface EMG was used to measure pectoralis major, serratus anterior, and upper trapezius activity. A paired t-test was used to determine any statistically significant difference between the two conditions. Additionally, effect size was calculated to quantify the magnitude of EMG biofeedback in each muscle. Visual and auditory feedback reduced pectoralis major muscle activity significantly (p=.000) and increased the serratus anterior muscle activity significantly (p=.002), but did not induce a significant difference in upper trapezius muscle activity (p=.881). Thus, it is concluded that the visual and auditory feedback of pectoralis major muscle activity can be used to facilitate serratus anterior muscle activity during push-up plus.



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