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- Title
Sex as a moderator of body composition following a randomized controlled lifestyle intervention among Latino youth with obesity.
- Authors
Vander Wyst, Kiley B.; Olson, Micah L.; Keller, Colleen S.; Soltero, Erica G.; Williams, Allison N.; Peña, Armando; Ayers, Stephanie L.; Jager, Justin; Shaibi, Gabriel Q.
- Abstract
Summary: Background: Body composition differences between males and females emerge during adolescence and continue throughout adulthood; however, whether sex moderates body composition changes in adolescents with obesity after an intervention is unknown. Objective: To examine sex as a moderator of changes in adiposity following lifestyle intervention. Methods: A total of 136 Latino youth with obesity (BMI% 98.2 ± 1.3) aged 14 to 16 years old were randomized to either a 12‐week lifestyle intervention (27 males/40 females) or control (35 males/34 females) group. The intervention included nutrition education (1 h/wk) and moderate‐to‐vigorous physical activity (3 h/wk). Anthropometric data (body mass index [BMI], BMI%, waist circumference, total body fat, and fat‐free mass) were obtained pre‐ and post‐intervention. Sex differences were examined by general linear models with significance determined at P <.05 for the F‐statistic. Results: Sex did not moderate changes in BMI (F1,115 = 0.01, P =.9), BMI% (F1,115 = 0.14, P =.7), or waist circumference (F1,117 = 1.1, P =.3). Sex significantly moderated changes in body fat percent (F1,117 = 5.3, P =.02), fat mass (F1,116 = 4.5, P =.04), and fat‐free mass (F1,116 = 4.3, P =.04). Intervention males compared with females had greater relative reductions in fat percent (−4.1 ± 0.8% vs −1.2 ± 0.7%, P =.02) and fat mass (−5.0 ± 1.1 kg vs −1.5 ± 0.9 kg, P =.02) and gained more fat free mass (3.6 ± 0.9 kg vs 0.5 ± 0.8 kg, P =.02) when compared with same sex controls. Conclusion: Males and females exhibited a differential response to lifestyle intervention for percent fat, fat mass, and fat‐free mass indicating that sex‐specific improvements in body composition favours males over females.
- Subjects
TREATMENT of childhood obesity; ADIPOSE tissues; ANTHROPOMETRY; BODY composition; HISPANIC Americans; NUTRITION education; REGRESSION analysis; SEX distribution; BODY mass index; LIFESTYLES; LEAN body mass; PHYSICAL activity; WAIST circumference; ADOLESCENCE
- Publication
Pediatric Obesity, 2020, Vol 15, Issue 6, p1
- ISSN
2047-6302
- Publication type
Article
- DOI
10.1111/ijpo.12620