Details

Autor(en) / Beteiligte

• Ostendorf, Danielle
• Zaman, Adnin
• Dahle, Jared
• Blankenship, Jennifer
• Mitchell, Nia
• Caldwell, Ann
• Creasy, Seth
• Bing, Kristen
• Wayland, Liza
• Scorsone, Jared
• Bessesen, Daniel
• Melanson, Edward
• MacLean, Paul
• Catenacci, Victoria

Titel

Racial Differences in Short-Term Weight Loss within a Behavioral Weight Loss Intervention

Ist Teil von

• Obesity (Silver Spring, Md.), 2021-12, Vol.29, p.151-151

Ort / Verlag

Silver Spring: Blackwell Publishing Ltd

Erscheinungsjahr

2021

Quelle

Wiley Online Library

Beschreibungen/Notizen

• Background: Black adults typically lose less weight than non-Hispanic White (NHW) adults in response to behavioral weight loss interventions. One potential explanation for this health disparity may be a failure to account for the lower resting energy requirements that have been reported in Black vs NHW adults when assigning weight loss calorie goals. We explored racial differences in weight loss in response to a behavioral weight loss intervention in adults who were assigned calorie goals based on measured resting energy expenditure (REE). Methods: This secondary, exploratory data analysis used data from an ongoing 12-month behavioral weight loss intervention where adults with overweight or obesity were randomized to daily caloric restriction or intermittent fasting. REE was measured at baseline with standard indirect calorimetry (ParvoMedics) after a 12-hour fast. Both groups received calorie goals designed to produce a 34% weekly energy deficit from baseline energy requirements (REE · activity factor of 1.5). Weight (calibrated digital scale), energy intake (EI, 7 day diet diaries), and physical activity (PA), estimated as time spent stepping at a cadence >75 steps/min, (activPAL device worn for 7 days) were measured at 0 and 3 months. Linear mixed models were used to examine the association between race and change in outcomes over 3 months. Results: There were no differences between Black (n = 10) and NHW (n = 70) participants in baseline age (44 ± 9 vs 41 ± 9 years; mean ± SE), BMI (35 ± 4 vs 34 ± 5 kg/m2), sex (80 vs 77% female), REE (1604 ± 62 vs 1703 ± 33 kcal/d) or PA (27 ± 5 vs 27 ± 2 min/d), respectively. At 3 months, Black participants demonstrated less weight loss (-2.2 ± 1.1 vs -6.2 ± 0.4%; p < 0.01) vs NHW participants. Black and NHW participants demonstrated similar attendance to weight loss support sessions (71 ± 7 vs 77 ± 2%), decreases in EI (-245 ± 165 vs -489 ± 52 kcal/d), and increases in PA (8 ± 6 vs 9 ± 2 min/d), respectively, at 3 months. Conclusions: Provision of calorie goals based on measured REE did not ameliorate racial differences in short-term weight loss in a behavioral weight loss intervention. However, the sample size for Black participants was small, which may contribute to larger SEs for change estimates in this subgroup. Future studies with larger samples are needed to understand the complex factors that contribute to racial differences in weight loss.