Prevalence of metabolically healthy obese phenotype and associated factors in South American overweight adolescents: A cross-sectional study.

OBJECTIVE: The aim of this study was to verify the prevalence of metabolically healthy obese (MHO) phenotype and associated factors in South American adolescents who are overweight. METHODS: A cross-sectional study was carried out with 340 overweight adolescent boys and girls between 10 and 18 y of age. The participants were classified as MHO according to two definitions: absence of any metabolic syndrome component and absence of insulin resistance (IR). The MHO phenotype-associated factors analyzed were age, sex, nutritional status, waist circumference (WC), body composition, metabolic profile, and cardiorespiratory fitness. Multivariable logistic regression was used to determine predictors of MHO using odds ratios with 95% confidence intervals. RESULTS: The prevalence of MHO in South American overweight adolescents was 49.4% and 55.9% according to MS and IR criteria, respectively. Sex and WC were predictors of the MHO phenotype, considering MS classification criterion. For the IR criterion, age, WC, and triacylglycerol levels were independent predictors of MHO in adolescents. Cardiorespiratory fitness did not predict MHO phenotype in any of the criteria used. CONCLUSIONS: The prevalence of MHO in South American overweight adolescents was high and varied according to the definition used. Age, sex, WC, and triacylglycerolslevel were independent predictors of the MHO phenotype in this population.

Proposal of a normative table for body fat percentages of Brazilian young adults through bioimpedanciometry.

Identification of the body fat (BF) percentage allows health professionals to detect healthy or risky patterns in a population. However, no studies have elaborated BF cutoff points using the bioelectrical impedance method in young Brazilian adults. Thus, the objective of the present study was to elaborate normative tables for BF in Brazilian men and women (sedentary and physically active) between 18 and 39 years of age. A total of 3,111 adults (958 men and 2,153 women) were evaluated using bioimpedance measurements with the InBody 520 device. The data were distributed normally and divided into percentiles (P3, P10, P25, P50, P75, P90, and P97). The following values were observed: for men: P3=8.9%-12.5%; P10=12.6%-17.5%; P25=17.6%-25.3%; P50=25.4%-35.1%; P75=35.2%-43.0%; P90=43.1%-49.4% and P97=49.5%; for women: P3=18.7%-23.1%; P10=23.2%-28.7%; P25=28.8%-35.7%; P50=35.8%-42.9%; P75=43.0%-49.1%; P90=49.2%-52.1% and P97≥52.2%. These percentiles can be used to classify the adiposity of sedentary and physically active individuals evaluated by bioimpedanciometry.

Efeitos de um programa multiprofissional de tratamento da obesidade sobre o hábito e a frequência alimentar em adolescentes: diferenças entre sexos / Effects of a multiprofessional program for treatment of obesity on feeding behavior and frequency in adolescents: differences between sexes

Objetivo: Avaliar os efeitos de um Programa Multiprofissional de Tratamento da Obesidade (PMTO) sobre os hábitos alimentares de adolescentes de ambos os sexos. Métodos: Fizeram parte do estudo 53 adolescentes com excesso de peso, com idades entre 11 e 18 anos, sendo 30 meninas. A análise dos hábitos alimentares foi feita a partir do questionário de frequência alimentar e recordatório alimentar de 24 horas. Foram reportados dados referentes a oito semanas de intervenção. Resultados: Foi observada redução do consumo de doces (p=0,011) por parte das meninas, e de macarrão (p=0,039) e ovos (p=0,040) pelos meninos. Houve redução no valor calórico total nas meninas (p=0,006). O grupo feminino também demonstrou redução do consumo absoluto de carboidratos (p=0,016), proteínas (p=0,035), lipídios (p=0,018) e lipídios poli-insaturados (p=0,011). Quanto aos micronutrientes, houve redução no consumo de sódio (p=0,003) no mesmo grupo. Conclusão: Mudanças nos hábitos alimentares foram observadas em maior proporção no sexo feminino.

Objective: The aim of the present study was to assess the effects of a Multiprofessional Program of Obesity Treatment (PMTO) on feeding habits in male and female adolescents. Methods: In this study 53 adolescents with excess of weight aged from 11 to 18 years old, 30 girls, were included. The analysis of feeding habits was made with a food frequency questionnaire and a 24 hours recall. It was reported data related to eight weeks of intervention. Results: We observed reduction in candies consumption (p=0.011) in girls, and pasta (p=0.039) and eggs (p=0.040) in boys. Total energy intake decreased in girls (p=0.006). The female group also demonstrated reduction of carbohydrates (p=0.016), proteins (p=0.035), fat (p=0.018) and polyunsaturated fat (p=0.011). In relation to micronutrients, sodium consumption was decreased (p=0.003) in the same group. Conclusions: Changes in feeding habits were greater in girls.