TY - JOUR
T1 - Sex as a moderator of body composition following a randomized controlled lifestyle intervention among Latino youth with obesity
AU - Vander Wyst, Kiley B.
AU - Olson, Micah L.
AU - Keller, Colleen S.
AU - Soltero, Erica G.
AU - Williams, Allison N.
AU - Peña, Armando
AU - Ayers, Stephanie L.
AU - Jager, Justin
AU - Shaibi, Gabriel Q.
N1 - Publisher Copyright:
© 2020 World Obesity Federation
PY - 2020/6/1
Y1 - 2020/6/1
N2 - 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.
AB - 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.
KW - adolescents
KW - body fat percent
KW - fat mass
KW - lean mass
KW - sexual dimorphism
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U2 - 10.1111/ijpo.12620
DO - 10.1111/ijpo.12620
M3 - Article
C2 - 32072749
AN - SCOPUS:85079709849
SN - 2047-6302
VL - 15
JO - Pediatric Obesity
JF - Pediatric Obesity
IS - 6
M1 - e12620
ER -