Effect of Branched-Chain Amino Acid Supplementation on Body Composition Measured with SBIA: an Advanced BIA

支鏈胺基酸補充對身體組成之影響以先進之分段多頻生物電阻阻抗分析法探討

湯馥君(Fu-Chun Tang)

《中華民國營養學會雜誌》 28卷2期 (2003/06) Pp. 65-73

https://doi.org/10.6691/JCNS.200306_28(2).0003

摘要

This double-blind, counter-balanced study investigated the effect of branched-chain amino acid (BCAA) supplementation on the body composition of male college students majoring in physical education. The body composition of 19 (19~22-year-old) male university students was measured with a segmental bio-electrical impedance analyzer (SBIA) during the post-absorptive stage. Based on the swimming score for 600 m of the crawl stroke, students were divided into two groups: placebo (n = 9, BMI = 24.2 ± 2.1 kg/m2; 12 g glucose/day; in capsules) and BCAA ( n = 10, BMI =22.7 ± 1.5 kg/m2;12 g BCAA/day; in capsules, leucine 54%, isoleucine 19%, valine 27%) groups. Participants maintained their regular dietary intake and exercise activity with moderate/low intensity (60~70% maximum heart rate reserved, swimming and rowing, ~ 1.5 h/day) during the study. Body composition, measured before and after the 14 days of supplementation, of either group was not affected by dietary supplements. After pooling the data of the two groups, BMI was more closely correlated with body fat mass (r2 = 0.57, p ＜ 0.05) than with fat-free mass (r2 = 0.35, p ＜0.05). The waist-to-hip ratio (WHR) was highly correlated with body fat mass (r2 = 0.83, p ＜ 0.05) and fat mass index (FMI = fat mass/height2; r2 = 0.91, p ＜ 0.05), but relatively less correlated with BMI (r2 = 0.67,p ＜ 0.05). FMI was highly correlated with triceps skinfold thickness (TSF; r2=0.86, p ＜ 0.05). WHR and TSF can be used as potential indexes of body fat an its distribution. With SBIA, we not only can measure the body composition accurately but also can perform anthropometric assessments efficiently.

關鍵字

支鏈胺基酸 ； 身體組成 ； 耐力運動

並列摘要

This double-blind, counter-balanced study investigated the effect of branched-chain amino acid (BCAA) supplementation on the body composition of male college students majoring in physical education. The body composition of 19 (19~22-year-old) male university students was measured with a segmental bio-electrical impedance analyzer (SBIA) during the post-absorptive stage. Based on the swimming score for 600 m of the crawl stroke, students were divided into two groups: placebo (n = 9, BMI = 24.2 ± 2.1 kg/m2; 12 g glucose/day; in capsules) and BCAA ( n = 10, BMI =22.7 ± 1.5 kg/m2;12 g BCAA/day; in capsules, leucine 54%, isoleucine 19%, valine 27%) groups. Participants maintained their regular dietary intake and exercise activity with moderate/low intensity (60~70% maximum heart rate reserved, swimming and rowing, ~ 1.5 h/day) during the study. Body composition, measured before and after the 14 days of supplementation, of either group was not affected by dietary supplements. After pooling the data of the two groups, BMI was more closely correlated with body fat mass (r2 = 0.57, p ＜ 0.05) than with fat-free mass (r2 = 0.35, p ＜0.05). The waist-to-hip ratio (WHR) was highly correlated with body fat mass (r2 = 0.83, p ＜ 0.05) and fat mass index (FMI = fat mass/height2; r2 = 0.91, p ＜ 0.05), but relatively less correlated with BMI (r2 = 0.67,p ＜ 0.05). FMI was highly correlated with triceps skinfold thickness (TSF; r2=0.86, p ＜ 0.05). WHR and TSF can be used as potential indexes of body fat an its distribution. With SBIA, we not only can measure the body composition accurately but also can perform anthropometric assessments efficiently.

並列關鍵字

branched-chain amino acids ； body composition ； endurance exercise