12주 근력강화훈련 동안 표면근전도 신호의 특성

• 영문명: Characteristics of Surface Electromyography During Strength Training of 12 weeks
• 발행기관: 한국전문물리치료학회
• 저자명: 신화경(Shin Hwa-kyung) 조상현(Cho Sang-hyun) 차광석(Cha Kwang-suk)
• 간행물 정보: 『한국전문물리치료학회지』한국전문물리치료학회지 제10권 제1호, 109~128쪽, 전체 20쪽
• 주제분류: 의약학 > 의학일반
• 파일형태: PDF
• 발행일자: 2003.03.31

영문 초록

This study tested whether repeated measurement of median frequency (MDF)-related variables could express the muscle power changes during a 12-week DeLome strengthening program, by using consecutive overlapping FFT (Fast Fourier transformation) and integrated EMG (IEMG) from surface EMG data for isometric and isotonic exercise. To evaluate the effect of training, the following were recorded every 3 weeks for the elbow flexors and knee extensors of 5 healthy male volunteers: MVC, 1RM, limb circumference, and surface EMG during isometric MVC or isotonic contraction at 10RM load. From the EMG data, IEMG and variables from a regression analysis between MDF and time were obtained. MVC, 1RM, IEMG, and initial MDF increased linearly over the training period. The fatigue index and slope of the regression line increased temporarily until the 6th week and decreased thereafter. From these results, there appeared to be enhanced neural recruitment of fast twitch fibers in the first 6 weeks and continued enhancement in the recruitment and hypertrophy of fast twitch fibers, which led to increased fatigue resistance, over the last 6 weeks. Accordingly, the MDF and IEMG analysis technique could demonstrate the effect of the program detected significant changes in both isometric and isotonic contractions. EMG analysis methods can be used to estimate the electrophysiological and histological changes in skeletal muscles during a strengthening program.

목차

Abstract

Ⅰ. 서론

Ⅱ. 연구방법

Ⅲ. 결과

Ⅳ. 고찰

Ⅴ. 결론

인용문헌

키워드

FFT IEMG MDF Strengthening Surface EMG