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Previous studies used the same height chair, attaching importance to practicability, but the difference in each subject\u0027s lower thigh length may relate to the burden on the lower-limbs. This study aimed to examine the influence of different lower thigh lengths on floor reaction force and lower-limb strength during an STS movement. Thirty young-adult male subjects participated in this study (age: 22.7±2.6 yr, height: 172.8±4.8 cm, body-mass: 66.3±5.2 kg). The subjects were divided into three groups (G1\u003e42 cm, 42 cm≥G2≥38 cm, 38 cm\u003eG3) based on lower thigh length (G1: 44.1±2.5 cm, G2: 39.8±1.3 cm, G3: 34.3±2.1 cm). Namely, G1 was characterized by lower thigh length longer than 105% of 40 cm, G2 by 95–105% of lower thigh length and G3 by lower thigh length less than 95% of 40 cm, respectively. Subjects performed an STS movement twice from chairs at 40 cm-height and height adjusted by the lower thigh length of each subject. Vertical floor reaction force and electromyogram (EMG) on the rectus femoris and tibialis anterior muscles during an STS movement were measured to evaluate the force of knocking over and the burden on the lower-limbs. Fifteen parameters regarding floor reaction force (10) and EMG (5) were selected for analyses. Significant differences were found in floor reaction force at hip-syneresis (F1) and the impulse between hip-syneresis and appearance of the peak floor reaction force (F2). G1 was greater than G2 for the former, and G3 for the latter. Significant differences were found in active muscle mass of the tibialis anterior from the beginning of an STS movement to hip-syneresis (TE1) and peak active muscle level of the tibialis anterior (TE6). G1 was greater than G2 for the former, and G2 and G3 for the latter. 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Influence of the relative difference in chair seat height according to different lower thigh length on floor reaction force and lower-limb strength during sit-to-stand movement
http://hdl.handle.net/2297/40582
http://hdl.handle.net/2297/40582a51597b0-1e3a-4c87-8802-bffaf44532a1
名前 / ファイル | ライセンス | アクション |
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ED-PR-DEMURA-S-197.pdf (525.8 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2017-10-02 | |||||
タイトル | ||||||
タイトル | Influence of the relative difference in chair seat height according to different lower thigh length on floor reaction force and lower-limb strength during sit-to-stand movement | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Yamada, Takayoshi
× Yamada, Takayoshi× Demura, Shin-ichi |
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書誌情報 |
Journal of Physiological Anthropology and Applied Human Science 巻 23, 号 6, p. 197-203, 発行日 2004-01-01 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1345-3475 | |||||
NCID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11462444 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.2114/jpa.23.197 | |||||
出版者 | ||||||
出版者 | Japan Society of Physiological Anthropology = 日本生理人類学会 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Chair-seat height affects the burden on the lower-limbs during sit-to-stand (STS) movement. Previous studies used the same height chair, attaching importance to practicability, but the difference in each subject's lower thigh length may relate to the burden on the lower-limbs. This study aimed to examine the influence of different lower thigh lengths on floor reaction force and lower-limb strength during an STS movement. Thirty young-adult male subjects participated in this study (age: 22.7±2.6 yr, height: 172.8±4.8 cm, body-mass: 66.3±5.2 kg). The subjects were divided into three groups (G1>42 cm, 42 cm≥G2≥38 cm, 38 cm>G3) based on lower thigh length (G1: 44.1±2.5 cm, G2: 39.8±1.3 cm, G3: 34.3±2.1 cm). Namely, G1 was characterized by lower thigh length longer than 105% of 40 cm, G2 by 95–105% of lower thigh length and G3 by lower thigh length less than 95% of 40 cm, respectively. Subjects performed an STS movement twice from chairs at 40 cm-height and height adjusted by the lower thigh length of each subject. Vertical floor reaction force and electromyogram (EMG) on the rectus femoris and tibialis anterior muscles during an STS movement were measured to evaluate the force of knocking over and the burden on the lower-limbs. Fifteen parameters regarding floor reaction force (10) and EMG (5) were selected for analyses. Significant differences were found in floor reaction force at hip-syneresis (F1) and the impulse between hip-syneresis and appearance of the peak floor reaction force (F2). G1 was greater than G2 for the former, and G3 for the latter. Significant differences were found in active muscle mass of the tibialis anterior from the beginning of an STS movement to hip-syneresis (TE1) and peak active muscle level of the tibialis anterior (TE6). G1 was greater than G2 for the former, and G2 and G3 for the latter. It was suggested that when an STS movement is performed using a chair with the same height for each subject, the load imposed on the subject's leg at the time of an STS movement and the STS movement achievement strategy differed since chair seat height changes relatively by the difference in lower thigh length. Moreover, it is thought that the difference in these load conditions and movement strategies occurs when the chair seat height of a subject's lower thigh length is longer than 110%. When conducting the ability to achieve STS movement rating test, chair seat height considering each subject's lower thigh length may be needed. | |||||
権利 | ||||||
権利情報 | Copyright © Japan Society of Physiological Anthropology 日本生理人類学会 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://www.jstage.jst.go.jp/browse/jpa | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | http://jspa.net/ |