ABSTRACT OBJECTIVE To verify whether parental physical activity and social support are associated with adolescents meeting physical activity recommendations. METHODS This is a cross-sectional study that selected 1,390 adolescents (59.6% girls) from Curitiba, Paraná, Brazil. The IPAQ (International Physical Activity Questionnaire), QAFA (Physical Activity Questionnaire for Adolescents), and ASAFA (Social Support for Physical Activity Practice in Adolescents) questionnaires were applied. Binary logistic regression was used to test the relationship among the study variables. RESULTS For boys, having parents who “always attend” (OR = 1.96; 95%CI: 1.16–3.32) and having parents or legal guardians who meet the PA recommendations (OR = 2.78; 95%CI: 1.76–4.38) were associated with meeting the PA recommendations. Odds were greater after adjusting for socioeconomic status (OR = 3.47; 95%CI: 1.73–6.96) and schooling level (OR = 4.20; 95%CI: 1.96–9.02). For girls, those with parents or legal guardians who “sometimes encourage them” (OR = 0.61; 95%CI: 0.37–0.98) had lower odds of meeting PA recommendations. These odds were higher after adjusting for socioeconomic status (OR = 2.11; 95%CI: 1.36–3.29) and schooling level (OR = 4.30; 95%CI: 2.41–7.69). CONCLUSIONS Boys and girls were more likely to meet PA recommendations daily by having parents who meet PA recommendations than by receiving parental social support. These results could help establish future interventions aimed at modifying behaviors related to PA in adolescents.

ABSTRACT OBJECTIVE To verify whether parental physical activity and social support are associated with adolescents meeting physical activity recommendations. METHODS This is a cross-sectional study that selected 1,390 adolescents (59.6% girls) from Curitiba, Paraná, Brazil. The IPAQ (International Physical Activity Questionnaire), QAFA (Physical Activity Questionnaire for Adolescents), and ASAFA (Social Support for Physical Activity Practice in Adolescents) questionnaires were applied. Binary logistic regression was used to test the relationship among the study variables. RESULTS For boys, having parents who “always attend” (OR = 1.96; 95%CI: 1.16–3.32) and having parents or legal guardians who meet the PA recommendations (OR = 2.78; 95%CI: 1.76–4.38) were associated with meeting the PA recommendations. Odds were greater after adjusting for socioeconomic status (OR = 3.47; 95%CI: 1.73–6.96) and schooling level (OR = 4.20; 95%CI: 1.96–9.02). For girls, those with parents or legal guardians who “sometimes encourage them” (OR = 0.61; 95%CI: 0.37–0.98) had lower odds of meeting PA recommendations. These odds were higher after adjusting for socioeconomic status (OR = 2.11; 95%CI: 1.36–3.29) and schooling level (OR = 4.30; 95%CI: 2.41–7.69). CONCLUSIONS Boys and girls were more likely to meet PA recommendations daily by having parents who meet PA recommendations than by receiving parental social support. These results could help establish future interventions aimed at modifying behaviors related to PA in adolescents.

Resumo Objetivos: estimar a prevalência de tempo de tela de adolescentes em três diferentes cenários e possíveis associações com sexo, maturação sexual, faixa etária, classe econômica e estado nutricional. Métodos: estudo transversal realizado com amostra representativa de 3.979 adolescentes da Grande Curitiba. O tempo de tela (televisão, computador e videogame) foi autorrelatado e categorizado em ≤2h/dia, >2 a ≤4h/dia e >4h/dia. A regressão logística ordinal testou as associações. Resultados: amostra com idade média de 14,60±1,88 anos, formada por 51,2% de meninas.A prevalência de tempo de tela >4h/dia foi de 89,3%. Meninas (OR=0,61; IC95%=0,49-0,76) e os grupos de idade mais velhos (“14 a 16 anos” OR=0,29; IC95%=0,22-0,39 e “17 a 19 anos” OR=0,11; IC95%=0,08-0,16) eram menos propensos a estar nos grupos de maior tempo de tela. Conclusões: o tempo de tela acima de quatro horas parece ser o mais prevalente entre os adolescentes. Meninas e adolescentes mais velhos são menos propensos ao maior tempo de tela.

Abstract Objectives: to estimate the prevalence of adolescents’ screen time in three different scenarios and possible associations with gender, sexual maturation, age group, economic class, and nutritional status. Methods: a cross-sectional study conducted with a representative sample of 3,979 adolescents from Greater Curitiba. Screen time (television, computer, and video game) was self-reported and categorized as ≤2h/day, >2 to ≤4h/day, and >4h/day. Ordinal logistic regression tested the associations. Results: the sample consisted of adolescents of 14.60±1.88 years old, most girls (51.2%). The prevalence of screen time >4h/day was 89.3%. Girls (OR=0.61; CI95%=0.49-0.76) and the older age groups (“14 to 16 years” OR=0.29; CI95%=0.22-0.39, and “17 to 19 years” OR=0.11; CI95%=0.08-0.16) were less likely to be in the groups of higher screen time. Conclusions: screen time above four hours seems to be the most prevalent among adolescents. Older girls and teens are less likely to have higher screen time.

Abstract Objective: This longitudinal study aimed to verify possible changes in the time spent in sedentary activities occurring as screen-time, educational, cultural, social, and transportation domains in a sample of Brazilian adolescents between 2015 and 2017. Methods: It is a longitudinal prospective study with 586 adolescents from 12 to 15 years old at the Baseline (2015) enrolled in 14 public schools from Curitiba, Brazil. The Adolescent Sedentary Activity Questionnaire assessed the time spent in sedentary activities in five domains (recreational screen-time, educational, cultural, social, and transportation). A series of linear random effects regressions analyzed changes in the sedentary time between 2015 and 2017, with p < .05. Results: Overall, 323 adolescents dropped out of the study resulting in a retention rate of 44.9%. The overall sedentary time remained stable from 2015 to 2017 (-3.98 min/day, 95%CI: -15.39; 7.42). The screen-time decreased (-22.22 min/day, 95%CI: -30.30; -14.15), and educational (8.29 min/day, 95% CI: 3.52; 13.06), cultural (3.41 min/day, 95% CI: 0.66; 6.15) and social sedentary activities (8.20 min/day, 95% CI: 2.06; 14.34) increased from 2015 to 2017. Conclusion: Significant reductions in screen-time were evidenced along with increases in time spent on other sedentary activities of educational, cultural, and social nature.

ABSTRACT BACKGROUND: The COVID-19 pandemic may be having many psychological impacts on people, at both an individual and a community level. OBJECTIVE: To ascertain the relationship between the weekly frequency of physical activity and levels of stress among Brazilian adults during social distancing due to the coronavirus (COVID-19), and the interaction of sex in this association. DESIGN AND SETTING: Cross-sectional study with a descriptive approach conducted at a public university in Curitiba (PR), Brazil. METHODS: 2,000 Brazilian adults (average age 36.4 years; 59.6% women) were recruited according to convenience through digital media. They filled out a questionnaire in electronic format that asked for sociodemographic information, health data, food consumption data, weekly frequency of physical activity and stress levels on the 10-item Kessler psychological distress scale. Descriptive statistics and regression analyses were used to evaluate the data. RESULTS: Associations were observed for the following correlations: male sex * no physical activity (odds ratio (OR): 4.35; 95% confidence interval (CI): 1.14-16.67); female sex * physical activity 4 or 5 times a week (OR: 7.86; 95% CI: 2.28-27.05); female sex * physical activity 3 times a week (OR: 7.32; 95% CI: 2.09-25.58); female sex * physical activity 1 or 2 times a week (OR: 14.57; 95% CI: 4.28-49.57); and female sex * no physical activity (OR: 24.17; 95% CI: 7.21-80.97). CONCLUSION: The lower the weekly frequency of physical activity during the period of social distancing was, the greater the chances of having stress levels were, especially for women.

Resumo A presente investigação objetivou verificar modificações no consumo de cigarro e álcool em uma amostra de adolescentes do sistema estadual de ensino da cidade de Curitiba, Paraná, Brasil entre 2015 e 2017. Estudo longitudinal de coorte prospectivo realizado com 799 adolescentes, entre 11 e 15 anos. O consumo leve e excessivo de álcool e de cigarro foram avaliados através do questionário Youth Risk Behavior Survey (YRBS). Modificações do consumo de álcool e cigarro foram avaliadas através de modelos de Equação de Estimação Generalizável com distribuição de Poisson para obtenção de razões de taxas de incidência (RTI) com intervalos de confiança de 95% (IC95%). A variável “tempo” foi tratada como variável independente, juntamente com demais possíveis preditores (sexo, faixa etária, estado nutricional, nível socioeconômico, escolaridade do chefe da família, atividade física e tempo em tela). O consumo de cigarros (RTI= 1,32, IC95%= 1,02; 1,71), consumo leve (RTI= 1,32, IC95%= 1,13; 1,53) e excessivo de álcool (RTI= 1,21, IC95%= 1,04; 1,40) cresceram significativamente entre 2015 e 2017. O presente estudo denota que os adolescentes participantes desta investigação estão modificando seus comportamentos em direção a um estilo de vida menos saudável.

Abstract The scope of this study was to verify alterations in cigarette and alcohol consumption in a sample of adolescents from the state education system of the city of Curitiba in the State of Paraná between 2015 and 2017. It involved a longitudinal prospective cohort study conducted with 799 adolescents (11 to 15 years of age) between 2015 and 2017. The Youth Risk Behavior Surveillance System (YRBS) questionnaire evaluated mild and excessive alcohol and tobacco consumption. Modifications of alcohol and tobacco consumption were evaluated through Generalizable Estimating Equation (GEE) models with Poisson distribution to obtain Incidence Risk Ratios (IRR) with 95% confidence intervals (95%CI). The “time” variable was treated as an independent variable along with other possible predictors (gender, age bracket, nutritional status, socioeconomic level, head of household education, physical activity and screen time). Tobacco consumption (IRR= 1,32, 95%CI = 1,02; 1,71), mild (IRR= 1,32, 95%CI = 1,13; 1,53) and excessive (IRR= 1,21, 95%CI = 1,04; 1,40) alcohol consumption increased between 2015 and 2017. This study indicates that adolescents participating in this research are modifying their behaviors towards a less healthy lifestyle.

Resumo A presente investigação objetivou verificar modificações no consumo de cigarro e álcool em uma amostra de adolescentes do sistema estadual de ensino da cidade de Curitiba, Paraná, Brasil entre 2015 e 2017. Estudo longitudinal de coorte prospectivo realizado com 799 adolescentes, entre 11 e 15 anos. O consumo leve e excessivo de álcool e de cigarro foram avaliados através do questionário Youth Risk Behavior Survey (YRBS). Modificações do consumo de álcool e cigarro foram avaliadas através de modelos de Equação de Estimação Generalizável com distribuição de Poisson para obtenção de razões de taxas de incidência (RTI) com intervalos de confiança de 95% (IC95%). A variável “tempo” foi tratada como variável independente, juntamente com demais possíveis preditores (sexo, faixa etária, estado nutricional, nível socioeconômico, escolaridade do chefe da família, atividade física e tempo em tela). O consumo de cigarros (RTI= 1,32, IC95%= 1,02; 1,71), consumo leve (RTI= 1,32, IC95%= 1,13; 1,53) e excessivo de álcool (RTI= 1,21, IC95%= 1,04; 1,40) cresceram significativamente entre 2015 e 2017. O presente estudo denota que os adolescentes participantes desta investigação estão modificando seus comportamentos em direção a um estilo de vida menos saudável.

Abstract The scope of this study was to verify alterations in cigarette and alcohol consumption in a sample of adolescents from the state education system of the city of Curitiba in the State of Paraná between 2015 and 2017. It involved a longitudinal prospective cohort study conducted with 799 adolescents (11 to 15 years of age) between 2015 and 2017. The Youth Risk Behavior Surveillance System (YRBS) questionnaire evaluated mild and excessive alcohol and tobacco consumption. Modifications of alcohol and tobacco consumption were evaluated through Generalizable Estimating Equation (GEE) models with Poisson distribution to obtain Incidence Risk Ratios (IRR) with 95% confidence intervals (95%CI). The “time” variable was treated as an independent variable along with other possible predictors (gender, age bracket, nutritional status, socioeconomic level, head of household education, physical activity and screen time). Tobacco consumption (IRR= 1,32, 95%CI = 1,02; 1,71), mild (IRR= 1,32, 95%CI = 1,13; 1,53) and excessive (IRR= 1,21, 95%CI = 1,04; 1,40) alcohol consumption increased between 2015 and 2017. This study indicates that adolescents participating in this research are modifying their behaviors towards a less healthy lifestyle.

Resumo Introdução O esporte pode contribuir com a percepção de qualidade de vida dos adolescentes nessa fase de desenvolvimento. Objetivo Comparar os domínios da percepção de qualidade de vida de adolescentes, dos sexos masculino e feminino, praticantes de esporte no contraturno escolar (PE), praticantes de outra modalidade de exercício físico (PMEF) e não praticantes de exercício físico (NPEF). Método O estudo é transversal com delineamento ex post facto, com a população composta por adolescentes e com uma amostra de 374 sujeitos, dividida em três grupos. Para avaliar a percepção de qualidade de vida dos adolescentes, foi utilizado o questionário KIDSCREEN-52, e para a análise comparativa, o teste da Análise de variância (ANOVA) de um fator com post hoc de Scheffe. Resultados As comparações das dimensões de qualidade de vida (QV) mostraram que a prática esportiva é um importante fator para melhores percepções de QV e, consequentemente, uma melhor percepção de bem-estar, isto principalmente para o sexo masculino (F=5,38; 3,86; 4,79; 6,22; 7,93, para sentimentos; estado emocional; autopercepção; amigos; apoio social, respectivamente, p<0,05). Conclusão A prática esportiva, em especial na adolescência, merece destaque, já que os praticantes de esporte no contraturno apresentaram melhores percepções de QV nas diferentes dimensões analisadas.

Abstract Background Sports can enhance adolescents’ quality of life perception in their important development phase. Objective compare the domains of quality of life perception of adolescents, male and female, who participate in sports (SP), or another type of physical exercise (PTPE) and non-physical exercise practitioners (NPEP) in the school counterpart. Method The study is cross-sectional with ex post facto design, and its population is composed of adolescents, with a total sample of 374 subjects, divided into three groups (SP, PTPE, NPEP). To evaluate the perception of quality of life of the adolescents, the KIDSCREEN-52 questionnaire was used, and for the comparative analysis of the data, the Analysis of variance (ANOVA) test of a factor with post hoc of Schefe. Results The comparison of quality of life (QoL) dimensions showed that sports practice is an important factor for better perceptions of QoL, consequently a better perception of well-being, especially for males (F = 5.38, 3.86, 4.79, 6.22, 7.93, for feelings, emotional state, self perception, friends, social support respectively and with p <0.05). Conclusion The sport practice, especially in adolescence, deserves to be highlighted, since those who participate in sports in the counterpart presented significant and better perceptions of QoL in the different dimensions analyzed.

RESUMO Introdução A prática esportiva estruturada é essencial para a saúde dos adolescentes, visto que a adolescência é um período em que ocorrem diversas mudanças físicas, psicológicas, cognitivas e sociais, no qual a sensação de autonomia na tomada de decisões, pode levá-los a aderir a determinados comportamentos de risco para a saúde. Objetivos Verificar a associação da prática esportiva aos comportamentos de risco para a saúde em atletas adolescentes. Métodos Estudo transversal com 367 atletas (15,68 ± 0,78 anos) de Curitiba/PR. Os fatores associados e os comportamentos de risco para a saúde (CRS) foram avaliados através de questionários. A regressão de Poisson com variância robusta foi utilizada para analisar os fatores associados aos CRS, adotando p < 0,05. Resultados O esporte coletivo foi associado positivamente ao maior tempo de TV (RP: 3,11; IC de 95%: 1,13-8,58). Os anos de prática foram associados positivamente ao maior tempo de TV (RP: 1,14; IC de 95%: 1,01-1,29) e videogame (RP: 1,12; IC de 95%: 1,01-1,25). As associações negativas foram encontradas para o volume de treino semanal no maior tempo de videogame (RP: 0,92; IC de 95%: 0,86-0,99), no baixo consumo de vegetais (RP: 0,98; IC de 95%: 0,96-0,99) e no consumo leve (RP: 0,95; IC de 95%: 0,92-0,99) e excessivo (RP: 0,94; IC95%: 0,89-0,99) de bebidas alcoólicas. Conclusão O volume de treino semanal favorece redução de tempo de videogame, menos consumo de bebida alcoólica e aumento do consumo de vegetais em atletas adolescentes. Nível de Evidência III; Estudos diagnósticos - Investigação de um exame para diagnóstico; Estudo de pacientes não consecutivos, sem padrão de referência “ouro” aplicado uniformemente.

ABSTRACT Introduction Participation in structured sports activities is essential for the health of adolescents, since adolescence is a period in which several physical, psychological, cognitive and social changes occur, where the sense of autonomy in decision-making may prompt them to adhere to certain health risk behaviors. Objective To verify the association of sports participation with health risk behaviors in adolescent athletes. Methods A cross-sectional study with 367 athletes (15.68 ± 0.78 years) from Curitiba/PR (state of Paraná). Associated factors and health risk behaviors (HRB) were assessed using questionnaires. Poisson regression with robust variance was used to analyze factors associated with HRB, adopting p <0.05. Results Team sport was positively associated with longer TV viewing time (PR: 3.11; 95% CI: 1.13-8.58). Years of participation were positively associated with longer TV viewing (PR: 1.14, 95% CI: 1.01-1.29) and video game playing time (PR: 1.12, 95% CI: 1.01-1.25). Negative associations were found for weekly training volume in longer video game playing time (OR: 0.92, 95% CI: 0.86-0.99), low vegetable consumption (PR: 0.98, 95% CI: 0.96-0.99), and in light (PR: 0.95, 95%CI: 0.92-0.99) and excessive (PR: 0.94, 95%CI: 0.89-0.99) alcoholic consumption. Conclusion The weekly training volume favors a reduction in video game playing time, lower alcohol consumption, and increased vegetable consumption in adolescent athletes. Level of Evidence III; Diagnostic studies - Investigation of a diagnostic test; Study of non-consecutive patients, without a “gold standard” applied uniformly.

RESUMEN Introducción La práctica deportiva estructurada es esencial para la salud de los adolescentes, ya que la adolescencia es un período en el que ocurren varios cambios físicos, psicológicos, cognitivos y sociales, en el que el sentimiento de autonomía en la toma de decisiones puede llevarlos a adherirse a ciertas conductas de riesgo para la salud. Objetivos Verificar la asociación entre la práctica deportiva y las conductas de riesgo para la salud en atletas adolescentes. Métodos: Estudio transversal con 367 atletas (15,68 ± 0,78 años) de Curitiba/PR. Los factores asociados y las conductas de riesgo para la salud (CRS) se evaluaron a mediante cuestionarios. La regresión de Poisson con varianza robusta se utilizó para analizar los factores asociados a las CRS, adoptando p < 0,05. Resultados El deporte de equipo se asoció positivamente con un mayor tiempo de televisión (CD: 3,11, IC del 95%: 1,13-8,58). Los años de práctica se asociaron positivamente con un mayor tiempo de televisión (CD: 1,14, IC del 95%: 1,01-1,29) y videojuegos (CD: 1,12, IC del 95%: 1,01-1,25). Se encontraron asociaciones negativas para el volumen de entrenamiento semanal en el tiempo de videojuegos más largo (CD: 0,92; IC del 95%: 0,86-0,99), en el bajo consumo de vegetales (CD: 0,98; IC 95%: 0,96-0,99) y consumo leve (CD: 0,95; IC del 95%: 0,92-0,99) y excesivo (CD: 0,94, IC del 95%: 0,89-0,99) de bebidas alcohólicas. Conclusión El volumen de entrenamiento semanal favorece una reducción en el tiempo de videojuegos, un menor consumo de bebidas alcohólicas y un mayor consumo de vegetales en atletas adolescentes. Nivel de Evidencia III; Estudios de diagnóstico: investigación de una prueba de diagnóstico; Estudio de pacientes no consecutivos, sin un “estándar de oro” aplicado uniformemente.

Resumo Verificar o impacto de fatores associados ao nível insuficiente de atividade física e elevado tempo de tela em adolescentes. Estudo transversal, representativo, com 899 alunos de ensino médio da rede pública de São José dos Pinhais, Paraná, Brasil. Foram mensurados o nível de atividade física e o tempo de tela e classificados respectivamente de acordo com as recomendações da Organização Mundial da Saúde e da American Academy of Pediatrics. Os fatores associados para o nível insuficiente de atividade física e tempo de tela foram: sexo, maturação sexual, apoio social e autoeficacia para a prática de atividade física. As associações foram testadas com a regressão de Poisson. E o impacto dos fatores associados ao nível insuficiente de atividade física e do elevado tempo de tela foram calculadas pela fração atribuível populacional (FAP) e a redução relativa do risco (RRR). Na presença combinada do nível insuficiente de atividades físicas com o elevado tempo de tela, o sexo feminino apresentou uma FAP = 13,04, o estágio pós-púbere FAP = 9,91 e o apoio social apresentou uma RRR = 31,00. Os achados sugerem sexo feminino e estar no estágio pós-púbere como fatores de risco, e apoio social como fator protetor a presença combinada do nível insuficiente de atividade física e do elevado tempo de tela.

Abstract The scope of this study was to verify the impact of associated factors with insufficient physical activity levels and high screen time among adolescents. A cross-sectional and representative study was conducted with 899 public high school adolescents from São José dos Pinhais, Paraná, Brazil. It involved measurement of physical activity levels and screen time and classification according to the norms of the World Health Organization and the American Academy of Pediatrics. The factors associated with insufficient physical activity levels and high screen time were gender, sexual maturation, social support and self-efficacy in terms of physical activity. Poisson regression was applied to test the associations. Population attributable fraction (PAF) and relative risk reduction (RRR) calculated the impact of associated factors with insufficient physical activity levels and high screen time among adolescents. In the combined presence of insufficient physical activity levels with high screen time, the female sex presented PAF = 13.04, a post-pubertal stage PAF = 9.91 and social support presented RRR = 31.00. The findings suggest that being female and post-pubescent are risk factors, while social support is a protective factor, for combined insufficient physical activity levels and high screen time among adolescents.

Resumo Verificar o impacto de fatores associados ao nível insuficiente de atividade física e elevado tempo de tela em adolescentes. Estudo transversal, representativo, com 899 alunos de ensino médio da rede pública de São José dos Pinhais, Paraná, Brasil. Foram mensurados o nível de atividade física e o tempo de tela e classificados respectivamente de acordo com as recomendações da Organização Mundial da Saúde e da American Academy of Pediatrics. Os fatores associados para o nível insuficiente de atividade física e tempo de tela foram: sexo, maturação sexual, apoio social e autoeficacia para a prática de atividade física. As associações foram testadas com a regressão de Poisson. E o impacto dos fatores associados ao nível insuficiente de atividade física e do elevado tempo de tela foram calculadas pela fração atribuível populacional (FAP) e a redução relativa do risco (RRR). Na presença combinada do nível insuficiente de atividades físicas com o elevado tempo de tela, o sexo feminino apresentou uma FAP = 13,04, o estágio pós-púbere FAP = 9,91 e o apoio social apresentou uma RRR = 31,00. Os achados sugerem sexo feminino e estar no estágio pós-púbere como fatores de risco, e apoio social como fator protetor a presença combinada do nível insuficiente de atividade física e do elevado tempo de tela.

Abstract The scope of this study was to verify the impact of associated factors with insufficient physical activity levels and high screen time among adolescents. A cross-sectional and representative study was conducted with 899 public high school adolescents from São José dos Pinhais, Paraná, Brazil. It involved measurement of physical activity levels and screen time and classification according to the norms of the World Health Organization and the American Academy of Pediatrics. The factors associated with insufficient physical activity levels and high screen time were gender, sexual maturation, social support and self-efficacy in terms of physical activity. Poisson regression was applied to test the associations. Population attributable fraction (PAF) and relative risk reduction (RRR) calculated the impact of associated factors with insufficient physical activity levels and high screen time among adolescents. In the combined presence of insufficient physical activity levels with high screen time, the female sex presented PAF = 13.04, a post-pubertal stage PAF = 9.91 and social support presented RRR = 31.00. The findings suggest that being female and post-pubescent are risk factors, while social support is a protective factor, for combined insufficient physical activity levels and high screen time among adolescents.

RESUMO Objetivo: Verificar a associação entre a participação em atividade física (AF) e a agregação de comportamentos de risco à saúde (CRS) em adolescentes de ambos os sexos. Métodos: Estudo transversal com participação de 862 adolescentes (11 a 17 anos) matriculados em 14 escolas públicas, selecionadas aleatoriamente, da cidade de Curitiba, Paraná. Foram avaliados a participação em AF, o tempo em tela, o consumo de frutas, vegetais, cigarros e de bebidas alcoólicas por meio de questionários. Para a associação entre os níveis de participação em AF e a agregação dos CRS, foi utilizada a regressão logística multinominal com obtenção de razão de chances (RC) com intervalos de confiança de 95% (IC95%). Resultados: Os adolescentes com alta participação em AF apresentaram menores chances de agregação de 2-3 CRS (RC 0,38; IC95% 0,21-0,68; p<0,01) e 4-5 CRS (RC 0,29; IC95% 0,16-0,53; p<0,01). Meninos com alta participação em AF apresentaram menores chances de agregarem 2-3 CRS (RC 0,31; IC95% 0,13-0,75; p=0,01), e meninas, menores chances de agregação de 2-3 CRS (RC 0,41; IC95% 0,17-0,99; p=0,04) e 4-5 CRS (RC 0,25; IC95% 0,10-0,61; p<0,01). Conclusões: A alta participação em AF esteve inversamente associada com a agregação de CRS em adolescentes.

ABSTRACT Objective: To verify the association between participation in physical activity (PA) and the clustering of health risk behaviors (HRB) in adolescents of both genders. Methods: A cross-sectional study involving 862 adolescents (11 to 17 years old) enrolled in 14 randomly selected public schools from Curitiba, Paraná, Brazil. Participation in PA, screen time, consumption of fruit, vegetables, cigarettes and alcoholic beverages were the criteria evaluated. Multinomial logistic regression tested the association between participation in PA and clustering of HRB, and results are expressed Odds Ratio (OR) with 95% confidence intervals (95%CI). Results: Adolescents with high participation in PA had lower odds of clustering 2-3 HRB (OR 0.38, 95%CI 0.21-0.68; p<0.01) and 4-5 HRB (OR 0.29; 95%IC 0.16-0.53; p<0.01). Boys with high participation in PA had lower chances of clustering 2-3 HRB (OR 0.31, 95%CI 0.13-0.75; p=0.01), and girls had lower odds of clustering 2-3 HRB (OR 0.41; 95%CI 0.17-0.99; p=0.04) and 4-5 HRB (OR 0.25; 95%CI 0.10-0.61; p<0.01). Conclusions: High participation in PA was inversely associated with the clustering of HRB in adolescents.

RESUMO Objetivo: Verificar a associação do estado nutricional, da maturação biológica, do apoio social e da autoeficácia com o nível de atividade física de 2.347 escolares, de ambos os sexos, com idades entre 11 e 15 anos, de escolas estaduais da cidade de Curitiba, Paraná. Métodos: Foram coletadas as medidas antropométricas de massa corporal, estatura e altura sentada. A avaliação da maturação biológica foi realizada pelas análises da idade do pico de velocidade de altura e maturação sexual. O nível de atividade física, o apoio social dos pais e dos amigos e a autoeficácia foram analisados por questionários autorreportados. O estado nutricional foi obtido por meio de pontos de corte de índice de massa corpórea (IMC) específicos para idade e sexo. Razões de chances com intervalos de confiança de 95% (IC95%) foram obtidas por meio da regressão logística binária bruta e ajustada, adotando-se p<0,05. Resultados: Pouco mais da metade (52,3%; n=1.227) dos escolares é ativa, sendo os meninos em maior proporção (64,1%; p≤0,01). Foram associados com atividade física: estado nutricional (Odds Ratio [OR] 1,25; IC95% 1,01-1,56), maturação somática precoce (OR 0,71; IC95% 0,54-0,93), moderado e elevado apoio social dos pais (OR 1,85; IC95% 1,50-2,30 e OR 2,70; IC95% 2,11-3,42, respectivamente) e elevado apoio social dos amigos (OR 1,78; IC95% 1,42-2,24). Conclusões: O estado nutricional, a maturação somática precoce, o apoio social dos pais e dos amigos foram correlatos da atividade física. Meninas com excesso de peso e com moderado e elevado apoio social dos pais, e meninos com maior apoio social dos pais e dos amigos foram mais ativos, enquanto meninas maturadas precocemente, menos ativas.

ABSTRACT Objective: To verify the association of nutritional status, biological maturation, social support and self-efficacy with the physical activity level of 2,347 students of both sexes, aged between 11 and 15 years old, enrolled in state schools in the city of Curitiba, Paraná, Brazil. Methods: Anthropometric measurements of body mass, height and sitting height were collected. The assessment of biological maturation was based on the analysis of the age at peak height and sexual maturity. The physical activity level, social support from parents and friends and self-efficacy were evaluated by self-reported questionnaires. Sex/age-specific body mass index (BMI) cutoff points identified the nutritional status. Gross and adjusted binary logistic regression were used to obtain odds (OR) ratios with 95% confidence intervals (95%CI), adopting p≤0.05 as significant. Results: More than half (52.3%; n=1,227) of students were active, with boys in a higher proportion (64.1%; p≤0.01). The correlates of physical activity were: nutritional status (OR 1.25; 95%CI 1.01-1.56), early somatic maturation (OR 0.71; 95%CI 0.54-0.93), moderate (OR 1.85; 95%CI 1.50-2.30) and high social support from parents (OR 2.70; 95%CI 2.11-3.42) and high social support from friends (OR 1.78; 95%CI 1.42-2.24). Conclusions: Nutritional status, early somatic maturation, social support of parents and friends were correlates of physical activity. Overweight girls with moderate and high parental support and boys with greater social support from parents and friends were more active. Girls with early somatic maturation were less active.