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Obesity has a complex multifactorial etiology and is characterized by excessive accumulation of adipose tissue. Visceral adipose tissue has deleterious effects on health because it secretes large amounts of inflammatory cytokines. Nutritional calorie restriction associated with strength training may be useful in managing chronic systemic inflammation. This study aimed to evaluate the acute effect of a single strength-training session on plasma adipokine levels in sedentary, overweight, and obese young men. This study included twelve men (Age: [34.95 ​± ​9.77] years; Height: [174.16 ​± ​3.66] centimeter [cm]; Weight: [97.83 ​± ​12.87] kilogram (kg); body mass index [BMI]: [32.30 ​± ​4.51] kg/m2), who performed a single strength training session. The strength training protocol consisted of 4 sets of 12 repetitions in the following six exercises, 45° leg press, bench press, leg extension, machine row, leg curl, and shoulder press. Blood samples were collected before, immediately after, and 1-h subsequent after strength training. The plasma levels of resistin and leptin were measured. A significant decrease in resistin levels were found 1 ​h after the strength training session if compared to levels before the training session (pre-[before] [2 390 ​± ​1 199] picograms per milliliter [pg/mL] vs post-1 h [1-h subsequent] [1 523 ​± ​798],6 ​pg/mL, p ​= ​0.002 8). The plasma leptin levels did not differ at any time point. In conclusion, a very well controlled single session of strength training significantly decreased the plasma levels of resistin without altering the concentration of leptin in overweight and obese individuals. This effect, at least in part, supports the benefits of exercise by reducing the low grade inflammation and insulin resistance in obesity.

Objective: To compare the acute effect of two training protocols until concentric failure (CF) with different intra-set interval (ISI) configurations (20 s and 40 s) on total weight, the total number of repetitions, and time under tension in trained subjects. Methods: Ten men participated in the study (age = 25.1 ± 4.4 years; body mass = 76.5 ± 10.4 kg; height = 175.8 ± 9.3 cm). Two protocols were performed with 4 sets of bench press exercises and differentiated by the ISI: i) Protocol ISI-40 (40 s) - each set consisted of 6 repetitions followed by an ISI of 40 s and completed with repetitions up to CF; ii) Protocol ISI-20 (20 s) - each set consisted of 6 repetitions with ISI of 20 s every 3 repetitions followed by repetitions to CF. The intensity was 10 repetitions maximum, and the rest interval between sets of 80 s. A minimum interval of 48 h was adopted between protocols. Results: There was no significant difference in the number of repetitions (p = 0.074), in the time under tension (p = 0.353) and in the total volume (p = 0.083) between the protocols. Conclusion: The results indicate that the different ISI configurations did not distinctly influence the number of repetitions, time under tension, and total volume.

O objetivo deste estudo foi descrever a estrutura, o perfil dos frequentadores e o padrão de utilização de Academias a Céu Aberto (ACA) localizadas em áreas de vulnerabilidade distintas de Belo Horizonte, Minas Gerais. Estudo com delineamento transversal e análises exploratórias, realizado em duas ACA no ano de 2016. Foram utilizadas três abordagens in loco para mensurar as variáveis de interesse: das estruturas das ACA (PARA), entrevistas face-a-face com os usuários presentes e observação sistemática dos frequentadores (SOPARC). Os dados foram analisados com a estatística descritiva e testes de qui-quadrado e Fisher no software R (p < 0,05). ACA-médio risco apresentou melhores estruturas para exercícios, conforto para usuários e condições de limpeza, estética e segurança comparadas à ACA-baixo risco. Foram entrevistados 49 adultos (51,2% mulheres) e observados 294 frequentadores (59,9% homens). Entre os usuários entrevistados, a maioria tinha mais de 50 anos, apresentavam sobrepeso ou obesidade (65,2%). Ademais, 51,0% dos entrevistados realizavam 150 minutos ou mais de atividade física moderada ou vigorosa, sendo que 24,5% deles atingiram esse tempo utilizando apenas as ACA (p = 0,016). Por meio do SOPARC, foi observado proporcionalmente maior presença de adultos (62,0%), de frequentadores em atividades sedentárias (58,4%), seguido de exercícios nos aparelhos das ACA (34,7%), e em dias de semana (64,0%). Proporção significativa de frequentadores em atividades sedentárias foi observada na ACA-baixo risco (p < 0,001). Este estudo contribui para orientação de políticas públicas de promoção de atividade física nas ACA, reforçando a relevância dos aspectos do ambiente físico e social no planejamento, monitoramento e avaliação dessas intervenções.