The aim of this study was to assess the effects of an acute session of resistance exercise with blood flow restriction in modulation of oxidative stress parameters at different moments. Eleven participants (23.72 ± 3.49 years and 81.51 ± 6.10 kg) were recruited to perform a crossover design with three protocols: high intensity resistance exercise (HI 80% 1RM), low intensity resistance exercise (LI 30% 1RM), and with blood flow restriction (LI-BFR 30% 1RM). The oxidative profile in an acute session at four moments was assessed: baseline, immediately after exercise, and 24 and 48 hours later. The Ethics Committee at the Methodist University Center-IPA (Porto Alegre, Brazil) approved this study. The results did not show statistical significance (p>0.05) among moments and among groups for TBARS and protein carbonyls. Likewise, for the antioxidant activity there was also no difference (p>0.05) among moments and groups for sulfhydryl groups. The superoxide dismutase enzyme demonstrated a significant reduction (p<0.05) between baseline and immediately after exercise in the LI-BFR group. After group comparison, the HI group showed a significant increase (p<0.05) in baseline and 24 hours when compared to the LI-BFR. An equal increase was observed in the HI group at the moment of 24 hours later when compared to the LI group. The catalase enzyme levels in the LI group were significantly higher than in the LI-BFR and HI groups at baseline and 24 hours (p<0.05) later. Lastly, the low intensity resistance exercise with blood flow restriction in maximum repetition appears not to have modified the oxidative profile in young and healthy subjects, suggesting that the hypertrophy mechanism of that methodology of training occurred in other molecular ways.

RESUMOObjetivos: Comparar os efeitos de dois programas de exercícios, treinamento concorrente e corrida em piscina funda, associados à orientação nutricional, na perda de peso e composição corporal de obesos. Métodos: Cinquenta indivíduos foram divididos em dois grupos, conforme o tipo de programa de treinamento físico. Um dos grupos, composto por 23 indivíduos, foi submetido a um treinamento concorrente (aeróbico e força); e 27 foram submetidos a corrida em piscina funda (aeróbico). Todos receberam a mesma orientação nutricional. Os participantes foram avaliados quanto ao peso, altura, circunferências, índice de massa corporal e composição corporal (massa gorda e massa magra), antes e após 45 dias do programa. Para análise das variáveis entre os grupos foi aplicado o teste t de Student e para avaliar o efeito da perda de peso nas demais variáveis, a correlação linear de Pearson. O nível de significância adotado foi de menos de 0,05. Resultados: A idade média dos participantes foi 48,1±12 anos, sendo 42 (84%) do gênero feminino. Após 45 dias de intervenção, 42 indivíduos perderam em média 2,96% do peso inicial, com redução significativa em todas as variáveis antropométricas, exceto da massa magra. Não houve diferença significativa na perda de peso e na composição corporal entre os indivíduos que praticaram o treinamento concorrente e os que praticaram corrida em piscina funda. Conclusões: Os dois grupos submetidos a treinamento físico e intervenção nutricional apresentaram perda de peso e alteração positiva na composição corporal, sem predomínio de efeito entre os tipos de exercício. DESCRITORES: OBESIDADE; COMPOSIÇÃO CORPORAL; EDUCAÇÃO NUTRICIONAL; ATIVIDADE FÍSICA. ABSTRACT Aims:To compare the effects of two exercise programs, concurrent training and running in deep water, associated with nutritional counseling, in weight loss and body composition in obese individuals. Methods: Fifty subjects were divided into two groups according to the type of physical training program. One group, composed of 23 individuals, underwent a concurrent training (aerobic and strength); and 27 underwent deep water running (aerobic). All received the same nutritional counseling. Participants were assessed for weight, height, girth, body mass index and body composition (fat mass and lean mass) before and after 45 days of the program. Student's t test was applied for analysis of variables between groups and Pearson correlation test was used to evaluate the effect of weight loss in the other variables. The significance level was set at less than 0.05. Results: The mean age of participants was 48.1±12 years and 42 (84%) were female. After 45 days of intervention, 42 individuals lost a medium of 2.96% of initial weight, with significant reductions in all anthropometric variables, except the lean mass. There was no significant difference in weight loss and body composition among individuals who practiced concurrent training or practiced running in deep water. Conclusions: Both groups that underwent physical training and nutritional interv...

AIMS: To evaluate, through anthropometric and biochemical parameters, the impact of an overweight management strategy implemented in an outpatient clinic for childhood obesity in a public hospital.METHODS: Retrospective analysis of a cohort of 206 children and adolescents with a diagnosis of obesity or overweight, aged between 5 and 17 years, attended between 2010 and 2014 with an average period of three months during one year. The strategy evaluated consisted of counseling, with guidelines aimed at reducing sedentary activity time and increased physical activity and nutritional guidelines for healthier food choices. Were evaluated anthropometric parameters (body mass index, z-escore of body mass index by age, waist circumference, hip circumference and waist hip ratio) and biochemistry (fasting glucose, fasting insulinemia, homeostasis model assessment, total cholesterol (CT), high density lipoprotein (HDL-c), low density lipoprotein (LDL-c), triclycerides (TG) at the baseline, at 6 and 12 months of follow-up. Statistical analyzes were performed in the IBM SPSS Statistics 22.0, using the Generalized Estimating Equations model.RESULTS: In 12 months, there was a significant reduction in BMI, Z score of BMI/age, percentage of individuals with BMI/age z score ≥ +2, WHR, percentage of individuals with WC > p90 and HC (p<0,001). Serum glycemia and insulin levels did not show significant reduction, only a trend, as did TC, LDL-c and TG, but HDL-c levels had a significant increase (p=0.035).CONCLUSIONS: This strategy of management of childhood and adolescent overweight, based on counseling, made it possible to reduce significantly the levels of overweight, although the biochemical parameters were not reduced in the same proportion.