Physical Therapy Korea (한국전문물리치료학회지)

Korean Research Society of Physical Therapy (한국전문물리치료학회)
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Effect of a Waist Belt on Postural Muscle Activity While Wearing a Lead Apron

납 앞치마 착용시 허리벨트가 자세근 활성도에 미치는 영향

  • Park, Jun-Sang (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University) ;
  • Kwon, Oh-Yun (Dept. of Physical Therapy, College of Health Science, Yonsei University, Dept. of Ergotherapy, The Graduate School of Health and Environment, Yonsei University, Institute of Health Science, Yonsei University) ;
  • Kim, Hee-Won (Dept. of Rehabilitation Medicine, Wonju Christian Hospital, Wonju College of Medicine, Yonsei University)
  • 박준상 (연세대학교 대학원 재활학과) ;
  • 권오윤 (연세대학교 보건과학대학 물리치료학과, 보건환경대학원 인간공학치료학과, 보건과학연구소) ;
  • 김희원 (연세대학교 원주의과대학 원주기독병원 재활의학과)
  • Published : 2004.09.17
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Abstract

The purpose of this study was to compare the postural muscle activity during wearing a lead apron with and without applying waist belt at working posture. Ten healthy male subjects were recruited for this study. Electromyography using a surface EMG recorded the activity of the splenius capitis, trapezius, and erector spinae. EMG activity was recorded at quiet standing, 45 degrees of neck flexion, 45 degrees of neck flexion with 15 degrees of trunk flexion. The testing order was selected randomly. The subjects were asked to maintain the each posture for 3 minutes. The mean root mean square (RMS) of EMG activity was calculated. EMG activity was normalized using the maximum voluntary isometric contraction (MVIC) elicited using a manual muscle testing technique. Two-factor repeated measures analysis of variance (ANOVA) was used to compare the average RMS value of EMG activity for each condition. The EMG activity of trapezius muscle was significantly decreased with applying waist belt (p<.05). The muscle activity of splenius capitis and erector spinae showed significant difference according to postures (p<.05). These results suggest that applying waist belt during wearing a lead apron will be useful to prevent shoulder pain.

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