Little is known about how the intensity of aerobic training influences appetite-regulating hormones in obese adolescents. Our goal was to assess the effect of low and high intensity aerobic trainings on food intake and appetite-regulating hormones in obese adolescents. Forty three obese adolescents (age: 13-18y, BMI: 34.48 ± 3.94 kg/m2) were randomized into high intensity training (HIT; n = 20) or low intensity training (LIT; n = 23) groups for 12 weeks. All participants also received the same nutritional, psychological and clinical counseling. Pre- and postintervention energy intake (EI) and circulating levels of insulin, leptin, peptide YY3-36 (PYY3-36) and ghrelin were measured. Adolescents in the HIT showed a reduction in total EI and an increase in PYY3-36 (p < .05). Aerobic exercise training performed at ventilatory threshold 1 intensity, reduced EI and augmented PYY3-36 in obese adolescents, compared with LIT. The data suggest that HIT and LIT have differential effects in the regulation of appetite signals and subsequent EI in obese adolescents.

BackgroundThe aim of this study was to determine the acute effects of exercise intensity on anxiety, mood states and hunger in obese adolescents.MethodsSubjects were eight male obese adolescents (age 15.44 ± 2.06y; BMI 33.06 ± 4.78 kg/m2). Each subject underwent three experimental trials: 1) Control, seated for 30 min; 2) Low intensity exercise (LIE) - exercise at 10% below ventilatory threshold (VT); 3) High intensity exercise (HIE) - exercise at 10% above VT. Anxiety (STAI Trait/State), mood (POMS) and hunger (VAS) were assessed before and immediately after the experimental sessions. Comparisons between trials and times were assessed using Kruskal-Wallis and Wilcoxon tests, respectively. Associations between variables were described using a Spearman test.ResultsThe largest increase in hunger was observed after LEI (914.22%). Both exercise sessions increased anxiety, fatigue and decreased vigor (p < 0.05).ConclusionsAcute exercise bouts are associated with negative changes in anxiety and mood, and with increases in hunger in obese adolescents.

The inclusion of a psychological counseling component in multidisciplinary treatment for adolescent obesity appears to provide benefits observed for improved QOL as compared with treatment without psychological counseling.

O objetivo do presente estudo foi analisar os efeitos da intervenção multidisciplinar sobre a insatisfação da imagem corporal em adolescentes obesos. Trinta e quatro adolescentes obesos com idade entre 12 a 19 anos, IMC≥95 th e púberes, foram submetidos à intervenção multidisciplinar composta por acompanhamento nutricional, psicológico, clínico e sessões de exercício físico. A insatisfação com a imagem corporal foi verificada através do Body Shape Questionnaire (BSQ). As avaliações foram realizadas antes e após 12 semanas de intervenção. Os efeitos da intervenção sobre a insatisfação da imagem corporal foram verificados utilizando-se o Qui-quadrado. Todas as análises foram realizadas com auxílio do software SPSS 10.0, p<0,05. Verificou-se no início da intervenção que 80,95% dos adolescentes apresentavam insatisfação com a imagem corporal, e após as 12 semanas de intervenção houve uma redução para 60,90% dos adolescentes com algum grau de insatisfação com a imagem corporal (p=0,05). Conclui-se que a intervenção multidisciplinar é uma importante estratégia para reduzir a insatisfação com a imagem corporal de adolescentes obesos.

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