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広島大学医学雑誌 48 巻 4 号
2000-08-28 発行
多周波数インピーダンス法による日本成人の身体組成評価 : 体脂肪と体水分の年代比較 <原著>
Multi-frequency Bioelectrical Impedance Method for the Assessment of Body Composition in Japanese Adults
山本 貴志子
西亀 正之
Abstract
多周波数生体電気インピーダンス(BI)法による日本成人の身体組成の標準値を設定する目的で, 体脂肪率(0.000000AT)および体水分量(TBW), 細胞外液量(ECW), 細胞内液量(ICW)の年代間の比較検討を行った。調査に同意の得られた18～84歳の日本成人2,034名(男性1,022名, 女性1,012名)を対象に, 多周波数インピーダンス機器(積水化学工業社MLT-100)により身体組成を測定した。%FATとBMI(body mass index)の相関はすべての年代群で有意に高くなった。BMI=22kg/m^2(22×体重/身長^2)に相当する%FAT値は, 男性21.2%, 女性32.4%となった。男性の%FAT判定の標準範囲は, 10および20歳代で13.8～22.4%, 30～70歳代以上で22.7～30.1%であり, 肥満値は, 10および20歳代で25.1%以上, 30～70歳代以上で32.2%以上であった。女性の標準範囲は, 10～40歳代で23.1～31.6%, 50～70歳代以上で31.1～39.6%であり, 肥満値は, 10～40歳代で33.9%以上, 50～70歳代以上で41.4%以上であった。%TBW平均値およびICW/TBW平均値は, 男女とも加齢に伴い減少し, ECW/TBW平均値は男女とも加齢に伴い増加した。本研究では, 多周波数BI法による%FATの年齢別の標準値を示した。また, 体脂肪および体水分は, 加齢に伴い変化することが示唆された。
Abstract
We determined body composition of Japanese adults using multi-frequency bioelectrical impedance measurements (MBI) in order to clarify age-related changes in percent body fat (%FAT) and body water distribution (TBW, ECW, ICW).
The subjects were 1,022 males and 1,012 females 18~84 years of age. Each person was informed as to the purpose of the study. Body composition was measured by a multi-frequency impedance apparatus (2.5 to 350 kHz, 100 μA). Analysis of variance was used to test for differences between age groups in each gender.
Percent body fat showed high correlation with body mass index in all age groups. The average %FAT increased with age in both genders. Percent body fat in the 25~75 percentiles was 13.8~22.4% in males 18~29 years of age, and 22.7~30.l % in males 30~81 years of age. Among the females, the corresponding values were 23.1 ~31.6% for 18~49 years of age and 31.1 ~39.6% for 50~84 years. In both genders, significant decreases in %TBW and ICW/TBW, and a significant increase in ECW/TBW were observed with age.
These data suggest that there is a definite gender difference in age-related changes in %FAT and body water distribution.
The subjects were 1,022 males and 1,012 females 18~84 years of age. Each person was informed as to the purpose of the study. Body composition was measured by a multi-frequency impedance apparatus (2.5 to 350 kHz, 100 μA). Analysis of variance was used to test for differences between age groups in each gender.
Percent body fat showed high correlation with body mass index in all age groups. The average %FAT increased with age in both genders. Percent body fat in the 25~75 percentiles was 13.8~22.4% in males 18~29 years of age, and 22.7~30.l % in males 30~81 years of age. Among the females, the corresponding values were 23.1 ~31.6% for 18~49 years of age and 31.1 ~39.6% for 50~84 years. In both genders, significant decreases in %TBW and ICW/TBW, and a significant increase in ECW/TBW were observed with age.
These data suggest that there is a definite gender difference in age-related changes in %FAT and body water distribution.
About This Article
著者キーワード
多周波数インピーダンス法
身体組成
生体電気インピーダンス法
体脂肪率
体水分量
Other Article
PP. 279 - 280