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KMID : 1211620150100040107
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Journal of the Korean Society of Physical Medicine
2015 Volume.10 No. 4 p.107 ~ p.112
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The Effects of Lower Limb and Trunk Muscle Activation on Seat Angle and Height during Sit to Stand and Stand to Sit
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김병조:Kim Byeong-Jo
이수경:Lee Su-Kyoung/이정훈:Lee Jung-Hoon/권해연:Kwon Hae-Yeon
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Abstract
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PURPOSE : This study investigated the effects of lower limb and trunk muscles activation on seat angle and height during sit to stand and stand to sit.
METHODS : Subjects were instructed to sit and stand on different angles and heights; 0˚(43cm), 5˚(48cm), 10˚(51cm) and 15˚(58cm). Measurements were conducted from sit to stand and stand to sit for external oblique, transversus abdominis, rectus femoris, vastus medialis, vastus lateralis, tibialis anterior and gastrocnemius muscle activation by surface EMG. The muscle activation was measured three times for five seconds in each posture, and the %RVC value was calculated after the exclusion of one second before and after this measurement. This calculation standardized the data from each participant so it could be comparatively analyzed.
RESULTS : The external oblique, tibialis anterior, and erector spinae muscles showed significant difference in 10˚ (51cm), 15˚(58cm) and 0˚(43cm), rectus femoris, in 15˚ (58cm) and 0˚(43cm)(p <.05) during sit to stand. The external oblique, tibialis anterior, and rectus femoris muscles showed significant difference in 0˚(43cm) and 15˚(58cm), erector spinae and vastus medialis muscles showed significant difference in 10˚(51cm), 15˚(58cm) and 0˚(43cm)(P<.05) during stand to sit.
CONCLUSION : The present study findings indicate that the toilet seat angle and height could affect muscle activities of the lower limb and trunk.
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KEYWORD
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Seat, Angle and height, Sit-to-stand
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