著者

谷口 岳平 山地 啓司 市川 真澄 Kouhei Taniguchi Keiji Yamaji Masumi Ichikawa

出版者

上越教育大学実技教育研究指導センター

巻号頁・発行日

vol.2(平成19年度), pp.1-9, 2008-02

著者

直原 幹 市川 真澄 伊藤 政展

出版者

日本武道学会

雑誌

武道学研究 (ISSN:02879700)

巻号頁・発行日

vol.41, no.2, pp.25-34, 2009-02-01 (Released:2012-11-27)

参考文献数

32

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“Tanden, ” a Japanese term for the lower abdominal region below the navel, is believed in oriental physical arts to be extremely important in maintaining vitality, staying calm, and taking rational action. In this paper, we examine whether the “tanden” focus of attention exherts an influence on postural control. The effectiveness of this “tanden” focus of attention on postural control is estimated by observing the equilibrium of subjects tasked with standing upright while following different sets of instructions. Four groups of subjects are instructed to stand still with minimal body sway while standing on a force-plate system that measures their center of pressure (COP). Each group is given different instructions: One group focuses on markers placed 26 cm away from the middle line of the force plate (external focus), a second focuses on their feet (internal focus), and the third on their “tanden” (internal focus). The control group is given no specific focus instructions. The parameters of equilibrium are the length of COP, average velocity of COP, and ellipse area of COp.The results show: 1) The length of COP is significantly shorter (p<0.05) in the “tanden” focus group than in the feet-focus group and the control group.2) The average velocity of COP is significantly slower (p<0.05) in the “tanden” focus group than in the feet-focus group and the control group.3) In the ellipse area of COP, there is no difference among the four groups. These results suggest that “tanden” focus of attention attenuates body sway.

著者

直原 幹 市川 真澄 山神 眞一 宮本 賢作

出版者

日本武道学会

雑誌

武道学研究 (ISSN:02879700)

巻号頁・発行日

vol.30, no.1, pp.14-21, 1997-08-31 (Released:2012-11-27)

参考文献数

41

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The location of the stance during the standard position (Chudan-no-kamae) in Kendo measured from skilled Kendo players (n=28) were divided in the two types, high grade type (=HG) and middle grade type (=MG), according to the trained career (=Dan-i and playing career) of them. The length, width and left foot angle made from vertical line estimated from the location of the stance were compared between HG and MG. The differences of equilibrium between HG and MG were studied in student Kendo players (n=10). The parameters of equilibrium determined by analyzing the center of the foot pressure were the displacement of the body sway and the body sway area. These parameters were compared between HG and MG. The length of the stance (cm/Height) was shorter significantly (p< 0.05) in HG (=0.12±0.03)than in MG (=0.15±0.05). In the width and left foot angle of the stance, there was no difference between HG and MG, respectively. The displacement of the body sway was shorter significantly (p< 0.01) in HG than in MG. As the total period kept standing, mean value of the displacement in HG (=716.6mm) was 14% shorter than in MG (=830.6mm). In the body sway area, there was no difference between HG (=28.9± 13.1cm2) and MG (=30.9 ± 17.0cm2). These results suggest that the equilibrium in Kendo posture correlate closely with the length of stance. In the present paper, correlation between biomechanical properties of the different stance types in Kendo players and skill levels of them are also discussed.

著者

市川 真澄

出版者

島根大学

雑誌

島根医科大学紀要 (ISSN:03879097)

巻号頁・発行日

vol.12, pp.1-4, 1989-12

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"Leaving the Yellow House"は1957年Esquireに発表され,1968年にMosby's Memoirs and Other Storiesの中に収録された短編である。主人公は72歳の老女Hattieである。自分の不注意による事故で怪我をし,余命いくばくもないと感じたHattieは唯一の財産である"the yellow house"を誰に譲ったらよいかと思い巡らすが誰もが己の利益のみを追求し,自分のことは少しも考えてくれないことを初めて知り,愕然とする。そしてHattieは落胆のあまり自分に"the yellow house"を譲渡する遺書をしたためる。この短編はBellow独特の含蓄のある,衝撃的な文章で終わる。