著者

藤田 英二 濱田 初幸 中村 勇 小山田 和行 野口 博之 松崎 守利 森﨑 由理江 安河内 春彦

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.50, no.3, pp.159-164, 2018

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This study used a dual-energy X-ray absorptiometry (DXA) method to investigate how body weight relates to fat-free mass index (FFMI) and fat mass index (FMI) in male college judo players. The whole-body fat-free mass and fat mass of 59 male college judo players were measured to the nearest 0.1 g using a DXA method. The fat-free mass and fat mass thus obtained were each divided by the square of the height (m) to give the FFMI and FMI, respectively. The percentage of body mass index (BMI) accounted for by FFMI and by FMI (%) was then calculated. The relationship between body weight and the percentage of BMI accounted for by FFMI and by FMI (%) can be interpreted as two straight lines with a break point. The break point can be determined by a regression analysis of these two straight lines using the plots of the percentage of BMI accounted for by FFMI and by FMI (%) by the least squares method. Using this method, the break point of two straight lines was obtained with the minimum square sum of the residual. The results showed the break point of the plots of percentage of BMI accounted for by FFMI and by FMI against body weight was 87.6 kg for both FFMI and FMI, and that as body weight increased, the proportion of FFMI in BMI decreased and the proportion of FMI in BMI increased. This break point indicates that the limit up to which it is possible to increase weight without worsening the body composition in male college judo players is around 90 kg, and any weight gain above this will depend on an increase in fat more than an increase in muscle.

著者

藤田 英二 濱田 初幸 中村 勇 小山田 和行 野口 博之 松崎 守利 森﨑 由理江 安河内 春彦

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.50, no.3, pp.159-164, 2018 (Released:2019-03-31)

参考文献数

19

被引用文献数

3

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This study used a dual-energy X-ray absorptiometry (DXA) method to investigate how body weight relates to fat-free mass index (FFMI) and fat mass index (FMI) in male college judo players. The whole-body fat-free mass and fat mass of 59 male college judo players were measured to the nearest 0.1 g using a DXA method. The fat-free mass and fat mass thus obtained were each divided by the square of the height (m) to give the FFMI and FMI, respectively. The percentage of body mass index (BMI) accounted for by FFMI and by FMI (%) was then calculated. The relationship between body weight and the percentage of BMI accounted for by FFMI and by FMI (%) can be interpreted as two straight lines with a break point. The break point can be determined by a regression analysis of these two straight lines using the plots of the percentage of BMI accounted for by FFMI and by FMI (%) by the least squares method. Using this method, the break point of two straight lines was obtained with the minimum square sum of the residual. The results showed the break point of the plots of percentage of BMI accounted for by FFMI and by FMI against body weight was 87.6 kg for both FFMI and FMI, and that as body weight increased, the proportion of FFMI in BMI decreased and the proportion of FMI in BMI increased. This break point indicates that the limit up to which it is possible to increase weight without worsening the body composition in male college judo players is around 90 kg, and any weight gain above this will depend on an increase in fat more than an increase in muscle.

著者

日下部 昭彦 小野口 博之 吉川 太郎

出版者

公益社団法人 日本コンクリート工学会

雑誌

コンクリート工学 (ISSN:03871061)

巻号頁・発行日

vol.48, no.10, pp.10_41-10_46, 2010 (Released:2012-03-27)

参考文献数

2

被引用文献数

1

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東海道新幹線東京駅高架橋改築工事は営業列車を通常運行させながら,多層多径間ラーメン高架橋の部分的な改築を130mにわたりアンダーピニング工法により実施した工事である。本工事は過去に東海道新幹線で実施されたアンダーピニング工法と比較して最も規模が大きく,かつ難度の高いものであり,平成21年2~3月に鋼製橋脚への仮受替え,平成22年5~6月に本設構造物への受替えを無事実施した。本稿ではその工事内容を報告する。