Physical Therapy Korea (한국전문물리치료학회지)

Korean Research Society of Physical Therapy (한국전문물리치료학회)
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An Electromyographic Analysis of Back muscle Activity when Subjects are Lifting Static Loads in One Hand

정적 부하의 비대칭적 적용에 따른 등 근육의 근전도 분석

  • Kim, Tae-Young (Dept. of Rehabilitation, College of Health Science, Yonsei University) ;
  • Park, Eun-Young (Dept. of Rehabilitation, The Graduate School, Yonsei University) ;
  • Lee, Eung-Sang (Dept. of Physical Therapy, Yonsei Rehabilitation Hospital, Yonsei University Medical Center)
  • 김태영 (연세대학교 보건과학대학 재활학과) ;
  • 박은영 (연세대학교 대학원 재활학과 물리치료전공) ;
  • 이응상 (연세의료원 재활병원 물리치료팀)
  • Published : 1997.05.10
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Abstract

Back muscles play an important role in protecting the spine. Epidemiological studies have shown that loads imposed on the human spine during daily living play a significant role in the onset of low back pain. No previous study has attempted to correlate the response of the trunk musculature with the type of external load. The purpose of this study was to use surface electromyography (EMG) to quantify the relative demands placed on the back muscles while lifting loads in one hand. Forty asymptomatic, twenty year-old subjects stood while lifting loads of 10% of body weight(BW) unilaterally. All EMG data were normalized to a percentage of the EMG voltage produced during no-load standing(%EMG). Our major analysis involved a paired t-test for repeated measures. Of particular note was the fact that the ipsilateral 10% of BW condition produced statistically less % EMG change than did the contralateral 10% of the condition.

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