Differences in resting energy expenditure in African-American vs Caucasian overweight females

Jakicic, J. M.; Wing, RR

doi:10.1038/sj.ijo.0800575

Cited by 87 publications

(67 citation statements)

References 28 publications

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“…Data from our laboratory has shown that oxygen consumption at rest was lower in overweight AfricanAmerican women compared to overweight Caucasian women, which resulted in a resting metabolic rate that was 506 kJaday (120 kcaladay) lower in overweight AfricanAmerican women compared to overweight Caucasian women when adjusting for age, body weight, and lean body mass. 4 Similar results have been reported by other investigators in overweight, 5,6 leaner, 7 younger 8 and older 9 populations. Therefore, resting metabolic rate may contribute to ethnic differences in body weight regulation.…”

Section: Introductionsupporting

confidence: 81%

“…3 Therefore, it has been suggested that there may be metabolic differences between the ethnic groups that contribute to changes in body weight. In fact, we have shown that resting energy expenditure is signi®cantly lower in African-American women compared to Caucasian women, 4 and this has been con®rmed by other investigators. 5±9 The current study examined whether this difference in energy expenditure at rest was also present during periods of activity.…”

Section: Discussionsupporting

confidence: 51%

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Do African-American and Caucasian overweight women differ in oxygen consumption during fixed periods of exercise?

2001

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OBJECTIVE: To examine whether there are ethnic differences in oxygen consumption during ®xed periods of exercise. DESIGN: Cross-sectional. SUBJECTS: Twenty-seven African-American and 120 Caucasian overweight adult women (body mass index 32.8 AE 4.1 kgam 2 , age 36.7 AE 5.6 y) prior to initiating a weight loss program. MEASUREMENTS: Measurement of oxygen consumption occurred during four stages of a graded exercise test, with body composition assessed by dual-energy X-ray absorptiometry. RESULTS: There were no signi®cant differences between overweight African-American and Caucasian women for absolute oxygen consumption or oxygen consumption adjusted for either body weight or fat-free mass across four levels of a submaximal graded exercise test. CONCLUSION: The results from this study suggest that African-American and Caucasian women do not differ in energy expenditure during ®xed workloads of exercise, suggesting that this may not contribute to differences in energy balance and body weight regulation between women in these two ethnic groups. International Journal of Obesity (2001) 25, 949±953

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Section: Introductionsupporting

confidence: 81%

Section: Discussionsupporting

confidence: 51%

Do African-American and Caucasian overweight women differ in oxygen consumption during fixed periods of exercise?

2001

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“…differences of 274 and 243 kcala day for the two studies, respectively). Also ®ve studies 19,22,27,29,32 did not include an overnight stay (i.e. inpatient status) prior to the determination of the RMR.…”

Section: Methodological Concerns In Rmr Studiesmentioning

confidence: 99%

“…However, several studies have observed consistent results after adjusting the RMR data both with and without the contribution of bone to calculated FFM. 22,27,28 Menstrual cycle phase. The RMR can vary as much as 10% between the luteal and follicular phases of the menstrual cycle.…”

Section: Methodological Concerns In Rmr Studiesmentioning

confidence: 99%

Do African Americans have lower energy expenditure than Caucasians?

2000

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OBJECTIVE: To review current studies that examine differences in energy expenditure between African Americans and Caucasians as possible modulators of attained differences in overweight status. DESIGN: Literature review of recent clinical and laboratory studies. METHODS: Studies chosen for review were those that examined directly resting metabolic rate (RMR), using indirect calorimetry, and total daily energy expenditure (TDEE) and physical activity energy expenditure (PAEE), using doubly labeled water. RESULTS: Ten of 15 studies reviewed reported a lower RMR in African Americans than in Caucasians. The differences in RMR between African Americans and Caucasians ranged from 81 to 274 kcaladay and could not be explained by differences in age, fat-free mass (FFM) or methodological concerns. Two of six studies of energy expenditure using doubly labeled water suggest that Black adults have a tendency for lower TDEE that can be accounted for primarily by a lower PAEE. CONCLUSIONS: If future studies indicate conclusively that African Americans do have lower RMR, TDEE and PAEE than Caucasians, then the disproportionally higher risk of obesity and associated metabolic disorders in Black adults may be preventable Ð especially in Black women. If these race differences are indeed a result of both physiological and behavioral factors, then interventions designed to reduce caloric intake andaor increase energy expenditure through lifestyle activity or structured exercise programs become especially important for African Americans and should be encouraged

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“…[1][2][3][4] In addition, some cross-sectional studies in children and adults have shown that blacks have a lower resting energy expenditure (REE) than do whites, even after adjusting for body composition. [5][6][7][8][9] This has been suggested as a possible reason for the increased prevalence of obesity observed in black individuals, particularly women, compared with white individuals. 5,6,8 However, not all studies have shown this ethnic difference in REE.…”

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confidence: 99%

Aerobic Fitness, Not Energy Expenditure, Influences Subsequent Increase in Adiposity in Black and White Children

et al. 2000

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ABSTRACT. Background. Low levels of energy expenditure and aerobic fitness have been hypothesized to be risk factors for obesity. Longitudinal studies to determine whether energy expenditure influences weight gain in whites have provided conflicting results. To date, no studies have examined this relationship in blacks or whether aerobic fitness influences weight gain in white or black children.Methods. One hundred fifteen children, 72 white (55 girls and 17 boys) and 43 black (24 girls and 19 boys) were recruited for this study. Aerobic fitness, resting, total, and activity-related energy expenditure and body composition were measured at baseline. The children returned annually for 3 to 5 repeated measures of body composition. The influence of the initial measures of energy expenditure and fitness on the subsequent rate of increase in adiposity was examined, adjusting for initial body composition, age, ethnicity, gender, and Tanner stage. Because 20 children did not attain maximum oxygen consumption, the sample size for the combined analysis was 95.Results. Initial fat mass was the main predictor of increasing adiposity in this cohort of children, with greater initial fat predicting a higher rate of increase of adiposity. There was also a significant negative relationship between aerobic fitness and the rate of increasing adiposity (F 1,82 ‫؍‬ 3.92). With every increase of .1 L/minute of fitness, there was a decrease of .081 kg fat per kg of lean mass gained. None of the measures of energy expenditure significantly predicted increasing adiposity in white or black children.Conclusions. Initial fat mass was the dominant factor influencing increasing adiposity; however, aerobic fitness was also a significant independent predictor of increasing adiposity in this cohort of children. Resting, total, or activity-related energy expenditure did not predict increasing adiposity. It seems that aerobic fitness may be more important than absolute energy expenditure in the development of obesity in white or black children. Pediatrics 2000;106(4). URL: http://www. pediatrics.org/cgi/content/full/106/4/e50; energy expenditure, fitness, longitudinal, obesity.

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Differences in resting energy expenditure in African-American vs Caucasian overweight females

Cited by 87 publications

References 28 publications

Do African-American and Caucasian overweight women differ in oxygen consumption during fixed periods of exercise?

Do African-American and Caucasian overweight women differ in oxygen consumption during fixed periods of exercise?

Do African Americans have lower energy expenditure than Caucasians?

Aerobic Fitness, Not Energy Expenditure, Influences Subsequent Increase in Adiposity in Black and White Children

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