푸시업플러스 시 근전도 바이오피드백을 이용한 전거근의 선택적 강화

• Published in: Han'guk Chŏnmun Mulli Ch'iryo Hakhoe chi = Journal of the Korean Academy of University Trained Physical Therapists Vol. 18; no. 1; pp. 1 - 8
• Main Authors: 전용진, Yong Jin Jeon, 정성대, Sung Dae Choung, 김시현, Si Hyun Kim, 신헌석, Heon Seock Cynn
• Format: Journal Article
• Language: Korean
• Published: 한국전문물리치료학회 28.02.2011; Korean Academy Of University Trained Physical Therapy
• Subjects: Biofeedback; Push-Up plus; Surface electromyography; 물리치료학; Push-Up plus; Biofeedback; Surface electromyography
• ISSN: 1225-8962; 2287-982X

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.