著者

中塘二三生

雑誌

臨床スポーツ医学 (別冊)

巻号頁・発行日

vol.7, pp.394-396, 1990

被引用文献数

1

著者

田中 喜代次 松浦 義行 中村 栄太郎 中塘 二三生 喜多尾 浩代 竹島 伸生 三村 寛一 前田 如矢

出版者

日本生理人類学会

雑誌

The Annals of physiological anthropology (ISSN:02878429)

巻号頁・発行日

vol.9, no.1, pp.59-65, 1990-01-01

被引用文献数

1

著者

中塘 二三生 田中 喜代次 羽間 鋭男 前田 如矢

出版者

日本体力医学会

雑誌

体力科學 (ISSN:0039906X)

巻号頁・発行日

vol.39, no.3, pp.164-172, 1990-06-01

被引用文献数

11 7

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Recently, bioelectrical impedance analysis systems(BIA)have become available for determination of human body composition, The validity of BIA has been found to be sufficiently in the American population. However, more work is needed to assess the validity and applicability of BIA to the Japanese population. The purposes of this study were (1) to test the validity of body composition measured by BIA in comparison with the underwater weighing criterion method, and (2) to develop a convenient equation that would reliably predict body composition using BIA and anthropometric measurements in Japanese females. The subjects were 226 Japanese womn and girls aged 11 to 55 years (23.9±8.3). Body impedance was measured using a tetrapolar electrode method, with a localized 800-μA and 50-kHz current injection(Selco SIF-881. The percentage of body fat (%fat) estunated by BIA was significantly correlated with densitometrically determined %fat (r=0.793, Lukaski et al.method;and r=0.800, Segal et al.method). The magnitude of these correlations was substantially higher when compared with r=0.615 found between the skinfold thickness method and the criterion method. Absolute %fat values estimated by BIA were, however, significantly lower than those determined by the criterion method, thereby indicating the need for a more accurate method of assessing Japanese body composition. For this, we propose the use of D=1.1303-0.0726(Wt/2), where D=body density in g/ml, Wt=body weight in kg, R=(R^2+Xc^2)<0.5> in ohms, and Ht=body height in cm. Lean body mass (LBM) and %fat predicted from this equation were correlated significantly (r=0.924 and r=0.799, respedtively) with values determined by densitometry. The standard error of estimates of LBM and %fat resulted in figures of 1.9kg and 3.7%, respectively. Thus we suggest that BIA is valid, convenient, and inexpensive, and that the prediction equation proposed in this study is useful for assessment of body composition in Japanese adult females.

著者

渡辺 完児 中塘 二三生 田中 喜代次 三宅 眞理 前田 如矢

出版者

日本体力医学会

雑誌

体力科學 (ISSN:0039906X)

巻号頁・発行日

vol.43, no.6, 1994-12-01

著者

中塘 二三生 田中 喜代次 渡辺 完児 三宅 眞理 前田 如矢

出版者

日本体力医学会

雑誌

体力科學 (ISSN:0039906X)

巻号頁・発行日

vol.41, no.4, pp.467-476, 1992-08-01

被引用文献数

9

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Several predichon equations for estimating body composition of Japanese men and women have recently been developed using a linear regression model with a combinahon of impedance and anthropometric measurements as independent variables. The purpose of this study was to determine the cross-validity of body density (Db) estimated from bioelectrical impedance (BI) and skinfold thickness (ST) methods in comparison with underwater weighing (UW) as a criterion reference method. Percentage body fat (%BF) was derived from Db according to the equation Brozek et al. Fifty-seven healthy Japanese women, aged 19 to 57 years, volunteered to prticipate in the study. Impedance was measured by use of a portablef four-terminal impedance plethysmograph (Selco, SIF-891). %BF derived from the BI method (r=0.860〜0.875) was correlated with hydrodensitometrically determined %BF to a greater extent than %BF obtained using the ST method (r=0.733〜0.758) or ultrasound method (r=0.536〜0.721). Correlations of various anthropometric indices (r=0.655〜0.691) with hydrodensitometrically deterinined %BF were even lower. It was noteworthy, however, that mean %BF derived from existing BI equations differed significantly from hydrodensitometrically determined mean %BF. Therefore, we attempted to develop a new equation that was applicable to Japanese adult women as follows : Db=1.1613-0.1038 (Wt・Z)/Ht^2, where Wt=weight in kg, Z=impedance in ohms, and Ht=height in cm. The prediction accuracy of this eqation was r=0.866 or SEE=0.0077g/ml. Cross-validation of this equation on a different sample (122 Japanese women, aged 18 to 59 years) revealed a correlation of r=0.869 in terms of %BF, SEE=3.2%, and no significant difference between estimated %BF and the criterion. We sugget that the BI method is one of the most convenient, valid means of assessing human body composition,and that the newly developed BI equation could be useful particularly when the subjects are Japanese adult women in their late teens to fifties.

著者

栗原 崇志 生田 香明 中塘 二三生 播本 定彦

出版者

社団法人日本体育学会

雑誌

体育學研究 (ISSN:04846710)

巻号頁・発行日

vol.29, no.4, pp.285-294, 1985-03-01

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Effects of sprint training were examined on the form in sprint running. Six non-athlete male university students aged 19-20 years engaged in the training program consisted of 50 m and 100 m sprint running three times a day, three days per week, for a period of ten weeks. They ran 50m and l00m using a starting block with maximum effort before and after the training period, and their form in sprint running was filmed at 100 frames per second at 40 m (50 m dash) and 85 m (100 m dash)point from the start 1ine. Further, an accomplished male sprinter (21 years of age) ran 50 m dash and his sprint form was filmed at 40 m point. Length of one cycle (length of two steps), duration of one cycle (time needed for two steps), velocity at the point, sprint record and seven kinematic factors were measured. Kinematic factors were 1) Upper leg angle and angular velocity, 2) Lower leg angle and angular velocity, 3) Knee angle and angular velocity, 4) Locus of toe around trochanter major. Results were as follows. 1) Before training, the toe movement around trochanter major in the former half of swing phase of non-athlete was lower than that of the sprinter (50m dash). 2) After training, the toe movement around trochanter major in the former half of swing phase was higher than that measured before the training (50m dash). 3) After training, maximum angular velocity of upper leg during top speed in 50 m and 100m sprint running significantly became faster than those measured before training. Maximum and minimum angular velocity of the knee during top speed in 50m sprint running significantly became faster than those measured before training. 4) Duration of one cycle at 40 m (50 m dash) and 85 m (100 m dash) point during sprint running shortened after the training significantly. Length of one cycle at the same point in some subjects lengthened, while such was not the case in other subjects. Running velocity which was culculated from duration and length of one cycle improved significantly. It is concluded that the short period of sprint training has the effect to improve sprint form and the sprint ability of male adults.