비대칭무게중심 물체의 동적 들기 작업시 좌ㆍ우 허리 근육의 EMG 진폭차이와 피로를 줄이기 위한 자세 연구

• 영문명: Strategical Postures for Relieving EMG Amplitude Discrepancy on Bilateral Low Back Muscles and Total Low Back Muscle Fatigue while Lifting Asymmetric Load Dynamically
• 발행기관: 한국산업경영시스템학회
• 저자명: 김선욱(Sun-Uk Kim) 한승조(Seung Jo Han)
• 간행물 정보: 『산업경영시스템학회지』제35권 제3호, 103~109쪽, 전체 7쪽
• 주제분류: 경제경영 > 경영학
• 파일형태: PDF
• 발행일자: 2012.09.30

영문 초록

The purpose of this paper is to suggest the strategical lifting postures able to alleviate imbalanced EMG amplitude leading to an increase in low back muscle fatigue while lifting asymmetric load dynamically. Eleven male subjects are required to lift symmetrically an external load with 15.8kg and load center of gravity (LCG) deviated 10cm to the right from the floor to the waist height at the speed of about 25cm/sec. The EMG amplitudes on bilateral low back muscles (Longissimus, Iliocostalis, and Multifidus) are recorded during 2sec and analyzed. Independent variables are trunk postures (No bending vs. Bending to the LCG) and feet placements (Parallel vs. Right foot in front of the other vs. Right foot behind the other). Dependent variables are EMG amplitude average on six muscles and the EMG amplitude difference between right and left muscle group. Results indicate the phenomenon showing an amplitude increase in the left muscle group is equal to an decrease in the right one is observed in dynamic as well as static lifts, bending the trunk to the LCG increases amplitude discrepancy more than no trunk bending, and the amplitude discrepancy in one foot ipsilateral to LCG in front of the other foot is lowest among other foot postures. As bilateral EMG amplitude discrepancy increases total low back muscle fatigue, the strategical combination of not runk bending and one foot close to LCG in front of the other is recommended for preventing elevated incidence of low back pain (LBP).

목차

1. 서 론

2. 본 론

3. 결론 및 토의

참고문헌

키워드

Asymmetric Load EMG Amplitude Discrepancy Foot Posture Dynamic Lifts Trunk Lateral Bending