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KMID : 1137820080290060484
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의공학회지
2008 Volume.29 No. 6 p.484 ~ p.492
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Analysis of Joint Movements and Changes of Muscle Length During STS(sit-to-stand) at Various Sitting Heights in the Korean Elderly’s daily life
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Hwang Sung-Jae
Son Jong-Sang
Kim S.-Y.
Kim Hyun-Dong
Lim Do-Hyoung
Kim Young-Ho
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Abstract
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Sit to stand(STS) movement is one of the most common activity in daily life. In addition, Korean traditionally stand up from various sitting heights in one’s daily life compared to other foreigners. As Korea enter rapidly to the aging society, needs of the elderly’s independent life are increasing. Therefore the importance of research about the analysis of elderly’s activity in daily life is rapidly increasing. In this study, we analyzed joint movements and changes of muscle length during STS(sit-to-stand) at various sitting heights(table seat, bath seat, bottom) in the Korean elderly’s daily life by using the motion analysis and musculoskeletal modeling. Ten Korean elderly and young were participated in this experiment. Three heights of sitting posture which could represent typical sitting in Korean daily life were chosen as table seat(42cm), bath seat(21cm) and bottom(0cm). As the results, the elderly showed both smaller knee/hip flexion and larger trunk flexion relatively in comparison to the young during table seat STS. The elderly also showed larger dorsiflexion and smaller ROM of knee, hip, trunk compared to the young during bath seat STS. Additionally, the elderly showed larger plantarflexion, hip flexion, smaller knee flexion and trunk flexion during the first half of bottom STS and larger knee flexion, hip flexion and trunk flexion during the second half of bottom STS. In addition, we could know contraction and relaxation characters of major muscles in lower limb during various STS through the analysis of changes in muscle length by musculoskeltal modeling.
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KEYWORD
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sit-to-stand, joint movements, muscle length, Korean elderly, sitting heights
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