투입구 높이 및 내부 드럼 깊이를 고려한 펄세이터 세탁기 사용시 평균신장 사용자의 관절 토크 및 근력에 미치는 영향

• Published in: Journal of biomedical engineering research Vol. 33; no. 4; pp. 184 - 193
• Main Authors: 김성국, 조영근, 이남기, 유승현, 임도형, 김한성, 고창용, Kim, Seong Guk, Cho, Young Kuen, Lee, Nam Gi, You, Joshua Sung Hyun, Lim, Dohyung, Kim, Han Sung, Ko, Chang-Yong
• Format: Journal Article
• Language: Korean
• Published: 대한의용생체공학회 01.12.2012
• Subjects: 의공학; Pulsator Washing Machine; Muscle strength; Three-dimensional Motion Analysis; Housework; Joint torque
• ISSN: 1229-0807; 2288-9396
• DOI: 10.9718/JBER.2012.33.4.184

Many studies have reported that housework done using household appliances may affect biomechanical characteristics of the musculoskeletal system. The purpose of this study was to investigate the effects of housework done using a pulsator washing machine on joints and muscles. We calculated joint torques and muscle strengths on the basis of an experimental/virtual three-dimensional motion analysis for six healthy females using the pulsator washing machine at different heights (H) and depths (D) of the inside drum (H (mm){\times}D (mm), Trial1: $962.5{\times}609.4$, Trial2: $962.5{\times}624.4$, Trial3: $982.5{\times}644.4$, Trial4: $995.5{\times}642.4$, Trial5: $1015.5{\times}677.4$). The joint torques and muscle strengths tended to be considerably different during torso flexion in the sagittal plane for all the trials. The maximum joint torques for the thoracic vertebra, left ankle, and right shoulder measured in Trial4 were significantly higher than those measured in the other trials (p < 0.05); in addition, those for the thoracic vertebra and both ankles measured in Trial5 were significantly higher than those measured in the other trials (p < 0.05). The maximum muscle strengths for the left trapezius muscle and both tibialis anterior muscles measured in Trial5 were significantly higher than those measured in the other trials (p < 0.05). These results indicate that housework done using a pulsator washing machine may affect joint torques and muscle strengths, and these effects are dependent on the height and/or depth of the inside drum of the pulsator washing machine.