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KMID : 1137820120330040184
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의공학회지
2012 Volume.33 No. 4 p.184 ~ p.193
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The Effects of Pulsator Washing Machine on Joints Torques and Muscles Strengths Considering Height of Outside Machine and Depth of Inside Drum for Average Height Users
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Kim Seong-Guk
Cho Young-Kuen
Lee Nam-Gi
You Sung-Hyun
Lim Do-Hyung
Kim Han-Sung
Ko Chang-Yong
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Abstract
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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: , Trial2: , Trial3: , Trial4: , Trial5: ). 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.
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KEYWORD
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Three-dimensional Motion Analysis, Housework, Pulsator Washing Machine, Joint torque, Muscle strength
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