Jakicic J M, Wing R R
University of Pittsburgh School of Medicine, PA 15213, USA.
Int J Obes Relat Metab Disord. 1998 Mar;22(3):236-42. doi: 10.1038/sj.ijo.0800575.
The purpose of this study was to examine differences in both resting energy expenditure (REE) and respiratory quotient (RQ) between overweight African-American and Caucasian women of comparable age and body mass index (BMI).
Cross-sectional.
REE was assessed in 41 women (22 African-American and 19 Caucasian) who were recruited to participate in this study. The African-American women were aged 36.4+/-5.7 y with a BMI of 32.6+/-5.4 kg/m2, and the Caucasian women were aged 35.4+/-5.7 y with a BMI of 31.3+/-3.4 kg/m2.
Body composition was assessed using dual energy x-ray absorptiometry (DEXA). REE was assessed via the dilution technique following an overnight fast.
REE was lower in African-Americans (7279+/-825 kJ/d) compared to Caucasians (7807+/-854 kJ/d) (P = 0.051). Analysis of covariance showed that REE remained significantly lower in African-American women after correcting for body weight and lean body mass. There was no effect of ethnicity on RQ.
These results indicate that there is a significant difference in REE between Caucasian and African-American overweight women. This difference in REE may contribute to the higher rates of obesity found in the African-American population. This difference may also partially explain the smaller weight losses typically seen in African-American women when compared to Caucasian women enrolled in a weight loss program.
本研究旨在探讨年龄和体重指数（BMI）相当的超重非裔美国女性和白人女性在静息能量消耗（REE）和呼吸商（RQ）方面的差异。
横断面研究。
对41名女性（22名非裔美国女性和19名白人女性）的REE进行了评估，她们被招募参与本研究。非裔美国女性年龄为36.4±5.7岁，BMI为32.6±5.4kg/m²，白人女性年龄为35.4±5.7岁，BMI为31.3±3.4kg/m²。
使用双能X线吸收法（DEXA）评估身体成分。禁食过夜后，通过稀释技术评估REE。
与白人女性（7807±854kJ/d）相比，非裔美国女性的REE较低（7279±825kJ/d）（P = 0.051）。协方差分析表明，在校正体重和瘦体重后，非裔美国女性的REE仍然显著较低。种族对RQ没有影响。
这些结果表明，白人超重女性和非裔美国超重女性在REE方面存在显著差异。REE的这种差异可能导致非裔美国人群中肥胖率较高。这种差异也可能部分解释了与参加减肥计划的白人女性相比，非裔美国女性通常体重减轻较少的原因。
