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Pregnant Women's Gait of Stair Decent with Different Treads
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임신기간 중 계단의 단너비에 따른 임산부 보행

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Type
Academic journal
Author
Hah, Chong-Ku (서울여자대학교 자연과학연구소) Ki, Jae-Sug (인천대학교 정보통신대학원) Jang, Young-Kwan (강원대학교 산업경영학과)
Journal
대한안전경영과학회 대한안전경영과학회지 대한안전경영과학회지 제11권 제2호 KCI Accredited Journals
Published
2009.1
Pages
103 - 110 (8page)

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Pregnant Women's Gait of Stair Decent with Different Treads
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The purpose of this study is to suggest a proper tread of stairs using kinematic factors and moments of the lower-limb joints in the stair decent with the 3 different treads with boimechanical method in ergonomics. 9 subjects (body masses; $59.41{\pm}7.49$, $64.03{\pm}6.65$, $67.26:{\pm}7.58$, heights; $160.50{\pm}6.35$ ages; $31.22{\pm}2.99$; parity; $1.67{\pm}0.71$) participated in three experiments that were divided by physiological symptoms (the early (0-15 weeks), middle (16-27 weeks) and last (18-39 weeks). and they walked at self-selected pace on 4 staircases 3 trials. As extending the pregnancy period, cadence was shorter but cycle time were longer more and more. As extending treads of stair decent during pregnancy, speed, stride lengths and cycle time were increased. As extending the treads of stair decent, hip and ankle moments increased but knee moments decreased in sagittal plane. There were increasing or decreasing of moments by means of treads. These changes may account for relation between the treads of stair and moments in pregnant women. The main changes of pregnant women were joint moments and kinematic factors during pregnancy period because pregnancy makes them physical changes. It is possible that joints have connection with compensation each other to maximize stability and to control gait motion. In conclusion, we suggest that the tread of stair is longer than 26cm tread. and exercise programs to improve muscle activity were necessary where joint moments were small.
#Pregnant Gait #Stair Decent #Joint Moment #Inverse Dynamics

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