The purpose of this study was to assess the intensity of official Futsal matches, expressed in different ways. Fourteen male professional Futsal players from a First Division Brazilian team volunteered to participate in this study. Maximal oxygen uptake (VO(2)max) and the heart hate (HR) and oxygen uptake (VO(2)) correlation were determined for each player. The match intensity was estimated from the players' average HR measured during 13 National Futsal League matches. The HR measurements were obtained while the players were in the court but the values recorded while the players were sitting on the bench were not considered. In addition, these HR values were used to estimate the intensity of the effort expressed as a percentage of the maximal HR (% HRmax), percentage of VO(2)max (% VO(2)max), kilocalories per minute (kcal·min(-1)), and total caloric expenditure. The mean intensity of the matches was 86.4 ± 3.8% HRmax, 79.2 ± 9.0% VO(2)max, 18.0 ± 2.2 kcal·min(-1), and 313 ± 9.3 kcal. It was concluded that official Futsal matches have high intensity when expressed in the different ways used in this study. The information provided by this research can be used for planning the athletes' workouts, diets, and resting periods.

No abstract

OBJECTIVE: To verify in male and female Brazilian adolescents the association of demographic, psychosocial, behavioral and sociocultural characteristics with the regular practice of physical activity. METHODS: The sample consisted of 109,104 adolescents from all Brazilian states attending the 9th year of elementary education in 2012. The response variable was the regular practice of physical activity (300+ minutes/week). The explanatory variables were grouped into four fields: demographic, psychosocial, behavioral and sociocultural. The Poisson regression was stratified by sex to evaluate the association. RESULTS: The prevalence of active adolescents was 20.2%, higher in boys (27.9%) than in girls (13.1%). It was observed a greater practice of physical activity in boys of lower age group, children of mothers with higher schooling, who consumed healthy foods such as beans, fruits, vegetables, and milk, as well as among those with family supervision. At the same time, unhealthy habits such as insomnia and alcohol consumption were also positively associated with physical activity. In girls, greater physical activity was observed among those who lived with mothers and whose mothers had higher schooling. In addition to family supervision, the practice of physical activity in girls was also positively associated with the frequency of meals with their parents. However, as in boys, insomnia and alcohol consumption were associated with an increase in the practice of physical activity. CONCLUSIONS: One-fifth of adolescents practice physical activity regularly, demonstrating the need for specific public policies to increase the percentage of active young people in the country. Maternal schooling, healthy eating habits and family supervision were associated with regular physical activity in boys and girls, evidencing the importance of the family for the acquisition of healthy habits in this age group.

RESUMO: Objetivo: Comparar a prevalência de adolescentes fisicamente ativos, residentes nas capitais brasileiras, investigados nos inquéritos da Pesquisa Nacional de Saúde do Escolar de 2012 e 2015. Método: A amostra foi composta por 61.145 (2012) e 51.192 (2015) adolescentes das 27 capitais brasileiras, frequentes no nono ano do ensino fundamental. O indicador atividade física globalmente estimada com o ponto de corte de 300 minutos ou mais por semana foi utilizado para determinar a prevalência de adolescentes fisicamente ativos nos dois inquéritos. Em seguida, as prevalências foram estratificadas pelas características sociodemográficas (sexo, idade, escolaridade da mãe e cor da pele) e pelas capitais. Para a comparações das variáveis entre as duas edições da pesquisa foi utilizada estatística descritiva, com análise dos intervalos de confiança de 95% (IC95%). Resultados: As prevalências de adolescentes fisicamente ativos observadas em 2012 (21,0%; IC95% 20,3 - 21,7) e 2015 (20,7%; IC95% 20,1 - 21,3) foram similares, independente das características sociodemográficas analisadas. Dentre as 27 capitais analisadas, apenas em Belém foi verificada redução no percentual de adolescentes fisicamente ativos, entre 2012 e 2015. Conclusões: Não houve alteração da prevalência de adolescentes fisicamente ativos que residem nos centros urbanos entre 2012 e 2015, evidenciando a necessidade de novas políticas públicas para promover a prática de atividade física, assim como a expansão das já existentes.