Pedometers have been used in some studies to measure physical activity in adolescents. However, cutoff points of steps per day that classify physical activity levels are not yet fully established. The aims of this study were to identify the possibility the number of steps/day to predict cardiovascular disease risk factors in adolescents and to propose cutoff points to the number of steps/day for adolescents. Method: 1,045 adolescents (51.7 % girls) aged 11-17 were randomly selected. The number of steps/day was measured using pedometers. The risk factors considered were total cholesterol, systolic and diastolic blood pressure, skinfold thickness and body mass index. The receiver operating characteristics (ROC) curve was used to analyze data. Results: ROC curve results indicated that the number of steps/day was able to predict increased systolic blood pressure in boys (<16,134 steps/day; p=0.006), increased diastolic blood pressure in girls (<12,399 steps/day; p=0.023) and increased total cholesterol in both sexes (<11,788 steps/day for boys; p=0.016 and < 9,400 steps/day for girls; p=0.001). Conclusion: It is possible to identify adolescents that are more likely to have increased total cholesterol and blood pressure by the number of steps/day.
--Physical activity levels in adults are low and strategies should be put in place to change this. The aim of this study was to investigate whether building an urban park can increase adult neighborhood residents' intentions to partake in physical activity. In total, 395 adults living near where the park was being built participated in the study. The following information was collected: sociodemographic characteristics, current physical activity levels, and intention to use the park for physical activity. Around 80% of the subjects intended to use the park for physical activity. This frequency was higher among those who were classified as physically active and gradually higher as the distance between the home of the subject and the park decreased (p < 0.05). The offer of a public leisure space can contribute positively to changing population behavior related to regular physical activity.
O objetivo desse estudo foi analisar a função muscular isocinética e a capacidade funcional de membros inferiores em atletas de futsal. Esse estudo transversal e descritivo foi formado por atletas de futsal profissional adulto, do sexo masculino, com idades entre 18 e 40 anos, praticantes de futsal por pelos menos 3 meses em treinamento regular. A função muscular dos atletas foi avaliada por meio de um dinamômetro isocinético (Biodex System Pro 4™), no qual foram avaliados os músculos extensores e flexores de joelho, na velocidade de 60°/s, em modo concêntrico e excêntrico. A capacidade funcional dos atletas foi avaliada por meio dos testes funcionais: single hop test, timed hop test e side hop test. Foi possível identificar um alto percentual de atletas com assimetria muscular unilatral do lado dominante (69,25%), seguido do não-dominante (58,33%). Além disso, a potência muscular lateral (avaliada pelo side hop test) e a potência muscular excêntrica dos isquiotibiais foram melhores no lado não dominante do que no lado dominante. Foi encontrado um percentual expressivo de atletas de futsal com assimetrias musculares unilaterais e déficits de potência muscular no lado dominante. Esses achados se configuram como importantes fatores de risco para o desenvolvimento de lesões musculoesqueléticas nesses atletas, e estratégias preventivas devem ser fomentados.
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