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Abstract Background To analyze the associations among autonomous motivation, self-efficacy, satisfaction of basic psychological needs, social support and perceived environment with physical activity practice of adolescents aged between 12 and 15 years; and to test autonomous motivations and self-efficacy as potential mediators of the associations between these environmental factors and physical activity practice. Methods We evaluated 553 adolescents, that participated in the ActTeens Program. Physical activity was assessed using the Physical Activity Questionnaire for Adolescents. Autonomous motivation, self-efficacy, satisfaction of basic psychological needs, parents’ social support and perceived environment were assessed using specifics questionnaires. Linear regression models were used to test the associations. Results Parents’ support (β = 0.32), satisfaction of basic psychological needs of colleagues (β = 0.21) and teachers (β = 0.12), and perceived environment (β = 0.10) had significant associations with physical activity (p

Abstract Background The aim of our study was to evaluate the impact of the ActTeens Program on physical activity and health-related physical fitness among adolescents in Brazil. Methods The “ActTeens Program” was conducted using a cluster-randomized controlled trial during 24-week school term. The sample consisted of 317 adolescents (52.7% girls; 13.61 ± 0.70 years) from four secondary schools that were randomly assigned to intervention group (N = 169) or control group (N = 148). This school-based physical activity (PA) intervention involved two components: (i) structured physical activity sessions delivered within physical education (PE) and (ii) healthy lifestyle guidance (mHealth). The primary outcome was PA assessed using Physical Activity Questionnaire for Adolescents (PAQ-A); secondary outcomes included muscular (MF) and cardiorespiratory fitness (CRF) assessed using 90-push-up, handgrip dynamometer, standing long jump, and 20 m PACER shuttle run test. Assessments were conducted at baseline, 12- and 24-week. Intervention effects were assessed using linear mixed models (LMM). Results For the primary outcome (PA), no significant group-by-time effects were observed for physical education based-PA (0.3 score; 95%CI: -0.1; 0.6; and − 0.01 score; 95%CI: -0.03; 0.03, at 12-wk and 24-wk respectively) and total PA (-0.02 score; 95%CI: -0.2; 0.2; and − 0.01score; 95%CI: -0.2; 0.2, at 12 and 24 weeks respectively). After 24 weeks, we observed a significant group by time effects for lower body muscular fitness (12.9 cm; 95%CI, 3.2 to 22.2). Conclusion The implementation of aerobic and muscle-strengthening exercises used in the ActTeens intervention did not lead to improvements in physical activity. The intervention resulted in improved lower body muscular fitness, however, we found no significant differences for upper body muscular and cardiorespiratory fitness.

ABSTRACT Objective: To examine the associations between self-reported screen time and symptoms of stress, anxiety, and depression in adolescents. Methods: A cross-sectional study was conducted with 982 adolescents aged between 12 and 15 years, enrolled in public schools in Jacarezinho (PR), Brazil. Screen time was assessed by the question “Considering a typical day, how much time do you spend watching TV, playing videogame, using computer or smartphone?” The DASS-21 questionnaire (short form) was used to assess symptoms of depression, anxiety, and stress. Crude and adjusted analyses (age, sex, and maternal level of education) between screen time and mental disorders symptoms were performed using general linear regression models, with Poisson distribution, with significance level at p

O objetivo deste estudo foi investigar a associação entre aptidão muscular e fatores de risco cardiovascular em adolescentes. A amostra foi composta por 1752 adolescentes (907 do sexo feminino), com idade média de 14,24±1,6 anos. A aptidão muscular foi mensurada pelos testes de pressão manual, salto horizontal e resistência abdominal. O escore da aptidão muscular foi calculado por meio da média da soma do z-escore de cada teste muscular. Os fatores de risco cardiovascular avaliados foram índice de massa corporal (IMC), pressão arterial sistólica e diastólica, e aptidão cardiorrespiratória (ACR) (vai e vem 20 metros). O escore do risco cardiovascular agrupado (RCV) foi calculado por meio da média da soma do z-escore de cada fator de risco. O sexo masculino apresentou melhor desempenho em todos os testes em comparação ao feminino (p

Abstract Background In adults, there is a substantial body of evidence that physical inactivity or low cardiorespiratory fitness levels are strongly associated with the development of metabolic syndrome. Although this association has been studied extensively in adults, little is known regarding this association in adolescents. The aim of this study was to analyze the association between physical activity and cardiorespiratory fitness levels with metabolic syndrome in Brazilian adolescents. Methods A random sample of 223 girls (mean age, 14.4 ± 1.6 years) and 233 boys (mean age, 14.6 ± 1.6 years) was selected for the study. The level of physical activity was determined by the Bouchard three-day physical activity record. Cardiorespiratory fitness was estimated by the Leger 20-meter shuttle run test. The metabolic syndrome components assessed included waist circumference, blood pressure, HDL-cholesterol, triglycerides, and fasting plasma glucose levels. Independent Student t-tests were used to assess gender differences. The associations between physical activity and cardiorespiratory fitness with the presence of metabolic syndrome were calculated using logistic regression models adjusted for age and gender. Results A high prevalence of metabolic syndrome was observed in inactive adolescents (males, 11.4%; females, 7.2%) and adolescents with low cardiorespiratory fitness levels (males, 13.9%; females, 8.6%). A significant relationship existed between metabolic syndrome and low cardiorespiratory fitness (OR, 3.0 [1.13-7.94]). Conclusion The prevalence of metabolic syndrome is high among adolescents who are inactive and those with low cardiorespiratory fitness. Prevention strategies for metabolic syndrome should concentrate on enhancing fitness levels early in life.

The present study aimed to analyze the association between sitting time and cardiovascular risk factors in Brazilian adolescents. The sample consisted of 1,777 adolescents (927 female). Sitting time was assessed by the Bouchard record. The risk factors evaluated were systolic blood pressure (SBP), diastolic blood pressure (DBP), and waist circumference (WC). The descriptions of continuous data are presented in values of mean and standard deviation. Student t test for independent groups. To verify the association between sitting time and measures of interest, multiple linear regression was applied. For data analysis, the statistical package SPSS version 22.0 was used and the significance was set at p

BACKGROUND: The acute and chronic effects of stretching preceding exercises on strength, power and muscular endurance are still not entirely clear in the literature. OBJECTIVE: To verify the acute and chronic effects of the main types of stretching (static, dynamic, PNF, and ballistic) on muscle strength, power, and endurance. METHODS: A systematic literature search was performed in: PubMed, Web of Science, LILACS, Scopus, Science Direct, and CENTRAL. The methodological quality was assessed using the PEDro scale. Meta-analysis were performed using the standardized mean difference (SMD). RESULTS: 43 studies were included in the systematic review and 30 in the meta-analysis calculations. Only two studies showed high methodological quality. In general, static stretching had an impact on the potentiated the gain in muscle strength of the lower limbs in the long term (0.60 [0.20–1.00]). The acute (ES = 0.38 [0.05–0.70]) and long-term (ES = 1.04 [0.21–1.88]) dynamic stretching was able to potentiate the gain of muscle power in the lower limbs, while the acute PNF had an impact on the worsening of the muscular endurance (ES = 1.68 [0.83–2.53]). CONCLUSIONS: When the training objective is linked to acute effects, dynamic stretching should be prioritized before the main activity. For long-term effects, static and dynamic stretching have been shown to potentiate muscle strength and power gain, respectively, and are recommended in these cases. [ABSTRACT FROM AUTHOR]

O exercício físico traz benefícios a aptidão física desde indivíduos sedentários até atletas profissionais. O objetivo do estudo verificar o efeito de um protocolo de 12 meses de treinamento de corrida sobre a aptidão física em mulheres. Participaram do programa 11 mulheres, com média de idade de 29 ±7,40 anos. O protocolo de treinamento ocorreu três vezes por semana com sessões de treino funcional, intervalado e contínuo. Foram realizadas 3 avaliações, no início (t0), após seis meses (t1) e após doze meses (t2), avaliando: pressão arterial, frequência cardíaca de repouso, peso, estatura, circunferência abdominal, força (60°/s) e potência no isocinético (300°/s), corrida 400m e 2400m. Para análise estatística foi utilizado anova para medidas repetidas seguido do post hoc de tukey, foi realizado teste d de Cohen para verificar a magnitude do efeito. Foi verificado nos primeiros seis meses uma diminuição da pressão arterial (p=0,014), frequência cardíaca (p=0,001) e circunferência abdominal (p=0,001), e ainda melhoras significativas no salto horizontal (p=0,001), corrida de 400m (p=0,001), corrida de 2400m (p=0,001), força flexora 60º e potência flexora 300º. Após os 12 meses de programa de exercício houve diminuição significativa no peso e IMC (p=0,001), e um aumento significativo na potência extensora 300º. A proposta de protocolo de treinamento de corrida promoveu efeitos significativos na aptidão física de mulheres nas variáveis de: força e potência muscular, capacidade cardiorrespiratória e melhoria da composição corporal.

Background/Objective: This study examined relationships between health-related physical fitness indicators and clustered cardiometabolic risk factors in adolescents between 2014 and 2017. Methods: The sample consisted of 93 students (60% girls), with complete data sets in both 2014 and 2017. The physical fitness components evaluated were: flexibility (sit and reach), muscular fitness (curl-up and push-up), cardiorespiratory fitness (progressive aerobic cardiovascular endurance run), and body fat (BMI). The cardiometabolic risk factors were: waist circumference, blood pressure, high-density lipoprotein cholesterol (HDL-C), triglycerides and fasting blood glucose. Z-scores were calculated for each risk factor, with the sum of risk factor z-scores values used to represent clustered cardiometabolic risk. Results: The results of cross-sectional analysis indicated that muscle fitness (curl-up: β = −0.37, p

This trial aims to investigate the effects of the ActTeens physical activity program, on adolescents' physical activity level, health-related fitness, cardiometabolic and mental health. The trial will aim to recruit ~140 adolescents (aged 13-14 years). Participants will be randomized into either intervention or control groups. The intervention will be guided by social cognitive theory and self-determination theory and implemented over one school term (24-weeks). The ActTeens Program will include: (1) structured physical activity sessions delivered within physical education, including movement-based games and dynamic stretching warm-ups; resistance training skill development; high-intensity training workouts; and cool-downs; (2) self-monitoring plus goal setting for physical activity by pedometer-smart wearable; and (3) healthy lifestyle guidance (social support) by WhatsApp® messages about healthy eating and regular physical activity for the intervention and parents groups. Study outcomes will be assessed at baseline, 24-weeks from baseline, and 12-months from baseline. Physical activity (accelerometer) is the primary outcome. Secondary outcomes include muscular and cardiorespiratory fitness, cardiometabolic profile, and mental health. A process evaluation will be conducted (i.e., recruitment, retention, attendance, and program satisfaction). This project will have the potential to address many questions and debates regarding the implementation of physical activity interventions in low-and- middle-income countries. Trial registration: ClinicalTrials.gov NCT05070377. Registered on 7 October 2021.

Objective:To compare the acute perceptive responses of different combined training methods in adolescents. Materials and Methods: The sample consisted of 50 adolescents, insufficiently active, aged between 14 and 18 years (58% female). The adolescents performed 2 sessions in a randomized order: moderate-intensity continuous training + resistance training (MICT + RT) and high-intensity interval training + resistance training (HIIT + RT). The rating of perceived exertion, affect, and satisfaction were measured by self-report in 5 moments during the combined training (HIIT or MICT—moments 1, 2, and 3; RT—moments 4 and 5) and 10 minutes after the end of the session. Results: During HIIT, adolescents reported higher values of rating of perceived exertion compared to the MICT session at moments 2 and 3 in both sexes (P <.05). In addition, at moments 2 and 3 of the HIIT session, female participants were reported to have a higher value of satisfaction compared to MICT (F = 3.953; P =.005; η2 =.067). Conclusion: During the execution of both HIIT + RT and MICT + RT protocols, adolescents showed an increase in the values of pleasure and satisfaction, regardless of sex. [ABSTRACT FROM AUTHOR]

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Os níveis de aptidão física dos adolescentes são um importante indicador de seu estilo de vida e podem prevenir o desenvolvimento de fatores de risco cardiometabólicos. Este estudo teve como objetivo comparar os fatores de risco cardiometabólicos em adolescente a partir das mudanças nos componentes de aptidão física relacionada à saúde após três anos de seguimento. Foram realizados testes motores segundo o manual do FITNESSGRAM (back-saver sit and reach; curl-up; push-up; e progressive aerobic cardiovascular endurance run) e foram avaliados os fatores de risco cardiometabólicos: circunferência de cintura; pressão arterial em repouso; HDL colesterol; triglicerídeos; e glicemia em jejum em dois momentos (2014 e 2017). Para comparar os fatores de risco cardiometabólicos a partir das mudanças dos componentes de aptidão física entre os períodos de acompanhamento foi aplicado o teste de Kruskal-Wallis ou ANOVA one-way. Foi observado melhora significativa dos componentes de AFRS com o passar dos anos, com exceção da aptidão cardiorrespiratória. Não foram identificadas diferenças estatísticas nos fatores de risco cardiometabólicos a partir da manutenção ou mudanças dos componentes de AFRS durante o período de acompanhamento.

A potência muscular apresenta relação com o tipo II de fibra muscular, com a capacidade glicolítica e com a coordenação motora, mas as características antropométricas podem estar relacionadas com esta aptidão. O objetivo deste estudo foi verificar a relação entre o pico de potência anaeróbia e o volume da coxa, assim como sua associação com outras variáveis antropométricas. Participaram do estudo 31 adolescentes do sexo masculino, praticantes de treinamento sistematizado de basquete, com idade média de 15,16 ± 1,11 anos, em estágio 3 e 4 de maturação sexual. As medidas antropométricas da perna e coxa, assim como o cálculo do volume da coxa, foram obtidos por meio das medidas de circunferência e comprimento, seguindo protocolo proposto por Sady et al. (1982). O pico de potência anaeróbia foi mensurado mediante teste de potência anaeróbia de Wingate. Foi utilizada a estatística descritiva (média e desvio padrão) para a caracterização da amostra. Para verificar o grau de correlação entre o volume da coxa e o pico de potência anaeróbia foi utilizado o teste de correlação binária de Pearson. Para observar a correlação entre o pico de potência anaeróbia e as variáveis antropométricas, foi feita a análise de regressão linear múltipla. Verificaram-se correlações significativas entre as variáveis antropométricas e a potência anaeróbia, havendo forte correlação da massa magra e o volume da coxa com a potência relativa e absoluta. Por meio da análise de regressão, a massa magra corporal determinou 83% da potência anaeróbia nestes adolescentes. Nossos resultados indicam que a potência anaeróbia está correlacionada com as medidas antropométricas, e a massa magra foi determinante no desempenho anaeróbio. As medidas dos comprimentos corporais e sua associação com as demais variáveis são relevantes para futuros estudos a ponto de predizer novos modelos preditivos para determinação do desempenho anaeróbio.

Purpose: To analyze the effects of 2 combined training methods on the cardiometabolic risk factors in adolescents. Methods: A total of 76 adolescents (16.1 [1.1] y, n = 44 female) were randomized into groups of moderate-intensity continuous training combined with resistance training (MICT + RT), high-intensity interval training combined with resistance training (HIIT + RT), or control. The training sessions were performed twice weekly for 12 weeks. The outcomes evaluated included body fat percentage, waist circumference, fasting blood glucose, fasting insulin, total cholesterol, triglycerides, low-density lipoprotein, high-density lipoprotein, glycated hemoglobin, insulin resistance index, blood pressure, peak oxygen consumption (VO2peak), and cardiometabolic risk Z score. Results: The intervention groups presented a significant reduction in the cardiometabolic risk Z score after 12 weeks of the combined exercise program. In relation to the cardiometabolic risk Z score between groups, the HIIT + RT group presented a significant intervention effect when compared with the control group (Cohen d = 0.23; P <.05). Significant intervention effects were found when comparing the MICT + RT and control groups for body fat percentage, high-density lipoprotein, and VO2peak. Between the HIIT + RT and control groups, significant intervention effects were found for body fat percentage, blood pressure, and VO2peak. There were not significant differences between the HIIT + RT and MICT + RT groups. Conclusion: Twelve weeks of HIIT + RT and MICT + RT were effective in significantly reducing the cardiometabolic risk in these adolescents. [ABSTRACT FROM AUTHOR]

A elevação crônica de níveis circulantes de marcadores inflamatórios é considerada um preditor de incapacidade e mortalidade. Nessa perspectiva, o exercício físico tem sido descrito com uma terapia não medicamentosa eficaz contra a obesidade, entretanto, sua ação sobre as adipocinas ainda não é clara. Assim, o objetivo do estudo foi realizar uma revisão sistemática sobre o efeito crônico dos exercícios físicos sobre os marcadores inflamatórios em adolescentes de ambos os gêneros com excesso de peso. Foi realizada uma busca sistemática nas bases de dados: Medline (Pubmed), Science Direct, Scopus, Sport Discus, Web Of Science, Cinahl, Scielo, Lilacs e Cochrane até maio de 2014. Os resultados apresentaram uma relação de dependência entre a composição corporal e as concentrações de adiponectina, PCR e leptina de adolescentes obesos, indicando que o treinamento físico foi eficaz na melhora dos marcadores inflamatórios apenas quando houve diminuição significativa da gordura corporal.

Este estudo teve como objetivo investigar os fatores associados à prevalência de síndrome metabólica (SM) em adolescentes. Participaram do presente estudo 391 escolares entre 10 e 18 anos. A mensuração da atividade física foi feita por meio do acelerômetro. Para se obter informações referentes ao comportamento alimentar foi empregado questionário proposto por Chiara e Sichieri. Para definição da SM foi utilizado à proposta adaptada para população pediátrica do NCEP-ATP III. A SM esteve presente em 3,4% da amostra e indivíduos obesos apresentaram elevada prevalência de SM (29,6%). Após ajuste pela idade, sexo e consumo alimentar, os adolescentes que realizam < 30min./dia de atividade física moderada a vigorosa apresentam o dobro de chances de diagnóstico de SM, no entanto, esta associação não apresentou significância estatística (p>0,05). Apesar da tendência apresentada de maior prevalência de SM nos adolescentes inativos, esta não foi estatisticamente significativa.

The aim of this study was to investigate the correlation between physical activity measured by accelerometry and excess weight in schoolchildren. Three hundred and ninety one school-age adolescents (10 to 18 years old) participated in the study. The cut-off points used to estimate time spent in physical activity were: moderate ≥3.0 METs and vigorous ≥6.0 METs. Student’s t-test and Pearson product-moment correlation coefficient were used to verify statistical differences and correlations between physical activity and body mass index (BMI). Statistical significance was set at p

O objetivo do presente estudo foi investigar a associação da atividade física medida pelo acelerômetro com o excesso de peso corporal em escolares. Trezentos e noventa e um adolescentes em idade escolar (10 a 18 anos) participaram deste estudo. Os pontos de corte utilizados para determinar o tempo gasto em atividade física foram: moderada ≥ 3,0 METs e vigorosa ≥ 6,0 METs. Teste t de Student e coeficiente de correlação produto-momento de Pearson foram utilizados para verificar diferenças estatísticas e associações entre atividade física e IMC. A significância estatística foi fixada em p

Abstract Background: Arterial hypertension is a major public health problem and has increased considerably in young individuals in past years. Thus, identifying factors associated with this condition is important to guide intervention strategies in this population. Objective: To determine high blood pressure prevalence and its associated factors in adolescents. Methods: A random sample of 1,242 students enrolled in public schools of the city of Curitiba (PR) was selected. Self-administered questionnaires provided family history of hypertension, daily energy expenditure, smoking habit, daily fat intake, and socioeconomic status. Waist circumference was measured following standardized procedures, and blood pressure was measured with appropriate cuffs in 2 consecutive days to confirm high blood pressure. Relative frequency and confidence interval (95%CI) indicated high blood pressure prevalence. Bivariate and multivariate analyses assessed the association of risk factors with high blood pressure. Results: The high blood pressure prevalence was 18.2% (95%CI 15.2-21.6). Individuals whose both parents had hypertension [odds ratio (OR), 2.22; 95%CI 1.28-3.85] and those with high waist circumference (OR, 2.1; 95%CI 1.34-3.28) had higher chances to develop high blood pressure. Conclusion: Positive family history of hypertension and high waist circumference were associated with high blood pressure in adolescents. These factors are important to guide future interventions in this population.

Objetivo: associar a hipertensão arterial por meio do sexo, estado nutricional e avanço da idade em adultos. Métodos: estudo transversal com 5.053 adultos de ambos os sexos (20 a 60 anos), da cidade de Curitiba, PR. O índice de massa corporal e pressão arterial foram classificados segundo recomendações da Organização Mundial da Saúde e Sociedade Brasileira de Hipertensão. Utilizou-se método descritivo, distribuição de freqüência, ANOVA one way e regressão logística binária para obtenção de "Odds Ratio", com pObjectives: associate hypertension although gender, nutritional state and advance of age in adults. Materials and methods: A cross-sectional study of 5053 adults of both gender (20 and 60 years) in the city of Curitiba in Brazil. Body mass index and blood pressure were classified according recommendations of the World Health Organization and the Brazilian Society of Hypertension. Used descriptive method, frequency distribution, one-way ANOVA and binary logistic regression to obtain the "Odds Ratio", with p

Este estudo objetivou verificar as diferenças do IMC, glicemia em jejum (GL), triglicerídeos (TG) e HDL-C em adolescentes de ambos os sexos com diferentes níveis de tempo gasto em atividade hipocinética (AH). Foram avaliados 487 indivíduos, os quais foram divididos em 3 grupos de acordo com o tempo gasto em AH (baixo, médio e alto), verificado por meio de um questionário recordatório. Realizaram-se aferições de massa corporal, estatura e cálculo do IMC, além de análises sanguíneas para identificar as concentrações de GL, TG e HDL-C. A ANOVA one way foi utilizada juntamente com o Post hoc de Tukey para a identificação das diferenças entre os grupos (p

FUNDAMENTO: A aterosclerose é a doença coronariana que acomete com maior frequência a população adulta brasileira. Embora seja uma doença predominantemente adulta, os fatores de risco associados podem surgir em indivíduos jovens. OBJETIVO: Verificar a associação do nível de atividade física (NAF) e o consumo de lipídios com os fatores de risco para aterosclerose em adolescentes. MÉTODOS: Foram avaliados 260 meninos e 237 meninas com idades entre 10-18 anos. O nível de atividade física foi estimado através do recordatório proposto por Bouchard e cols.. O consumo de lipídios foi avaliado através do inquérito alimentar desenvolvido por Sichieri e Everhart. A pressão arterial foi mensurada utilizando um esfigmomanômetro de coluna de mercúrio. O colesterol total, o HDL-C e os triglicérides foram determinados através do método enzimático-colorimétrico. O LDL-C foi calculado pela fórmula de Friedewald. Na análise estatística, foi empregada a regressão logística, com nível de significância estipulado em p < 0,05. RESULTADOS: Quanto ao NAF, 17,3% dos meninos e 22,6% das meninas foram classificados como sedentários. Para os hábitos alimentares, 54% e 48,6% dos meninos e meninas, respectivamente, apresentaram consumo de lipídios acima das recomendações. Meninos com níveis elevados de colesterol total e de LDL-C tiveram maior razão de chances de serem sedentários do que seus pares mais ativos. Apresentar níveis elevados de LDL-C esteve associado ao consumo excessivo de gordura saturada em ambos os sexos. CONCLUSÃO: Os resultados avigoram as evidências prévias de que jovens devem ser encorajados desde cedo à adoção de um estilo de vida fisicamente mais ativo associado a uma ingestão alimentar apropriada.FUNDAMENTO: La aterosclerosis es la enfermedad coronaria que afecta con mayor frecuencia a la población adulta brasilera. Aún cuando se trata de una enfermedad predominantemente de adultos, los factores de riesgo asociados pueden surgir en individuos jóvenes. OBJETIVO: Verificar la asociación del nivel de actividad física (NAF) y el consumo de lípidos con los factores de riesgo para aterosclerosis en adolescentes. MÉTODOS: Fueron evaluados 260 niños y 237 niñas con edades entre 10 y 18 años. El nivel de actividad física fue estimado a través del recordatorio propuesto por Bouchard et al. El consumo de lípidos fue evaluado mediante una encuesta alimentaria desarrollada por Sichieri y Everhart. La presión arterial se midió utilizando un esfigmomanómetro de columna de mercurio. El colesterol total, el HDL-C y los triglicéridos fueron determinados por el método enzimático-colorimétrico. El LDL-C se calculó mediante la fórmula de Friedewald. En el análisis estadístico, se empleó la regresión logística, con nivel de significancia estipulado en p < 0,05. RESULTADOS: En cuanto al NAF, el 17,3% de los niños y el 22,6% de las niñas fueron clasificados como sedentarios. En los hábitos alimentarios, el 54% y el 48,6% de los niños y niñas, respectivamente, presentaron consumo de lípidos por encima de las recomendaciones. Niños con niveles elevados de colesterol total y de LDL-C tuvieron mayor razón de chances de ser sedentarios que sus pares más activos. La aparición de niveles elevados de LDL-C estuvo asociada al consumo excesivo de grasa saturada en ambos sexos. CONCLUSIÓN: Los resultados refuerzan las evidencias previas de que los jóvenes deben ser incentivados desde temprano a la adopción de un estilo de vida físicamente más activo, asociado a una ingesta alimentaria apropiada.BACKGROUND: Atherosclerosis is the coronary disease that most often affects the adult Brazilian population. Although it is a predominantly adult disease, the risk factors can appear in young individuals. OBJECTIVE: To verify the association between the physical activity level (PAL) and the consumption of lipids with the risk factors for atherosclerosis in adolescents. METHODS: A total of 260 boys and 237 girls aged 10-18 years were assessed. The PAL was estimated based on the activity record proposed by Bouchard et al. The consumption of lipids was assessed through the food frequency questionnaire developed by Sichieri and Everhart. Blood pressure was measured using a mercury-column sphygmomanometer. Total cholesterol (TC), HDL-c and triglycerides (TG) were measured by the enzymatic-colorimetric method. LDL-c was calculated by Friedewald's formula. The statistical analysis was carried out through logistic regression, with a level of significance set at p < 0.05. RESULTS: Regarding the PAL, 17.3% of the boys and 22.6% of the girls were classified as sedentary. As for the diet, 54% and 48.6% of the boys and girls, respectively, presented a consumption of lipids above the recommended level. Boys with high TC and LDL-c levels had a higher OR to be sedentary than their more active peers. High levels of LDL-c were associated with the excessive consumption of saturated fats in both sexes. CONCLUSION: The results reinforce the previous evidence that young people must be encouraged since an early age to adopt a more physically active lifestyle, associated to more adequate dietary habits.

OBJETIVOS: caracterizar o estado nutricional e consumo alimentar de adolescentes da rede pública de ensino de São Mateus do Sul, Paraná, Brasil. MÉTODOS: o Índice de Massa Corporal foi calculado e classificado pela proposta da Organização Mundial da Saúde. O consumo alimentar foi obtido pelo Questionário de Freqüência de Consumo Alimentar. Foi utilizada análise descritiva, de freqüência e teste t de Student com pOBJECTIVES: to characterize the nutritional status and dietary intake of adolescents attending public schools in the city of São Mateus do Sul, in the State of Paraná, Brazil. METHODS: the Body Mass Index was calculated and classified as proposed by the World Health Organization. Dietary intake was calculated using the Survey of Consumer Food Frequency. Analysis was carried out using descriptive and frequency analysis, and Student's t test with p

This study compares the VO2max and body composition during puberty. The sample consisted of 102 male children (aged 8 to 17 years old) participating in systematic soccer training and 87 children not involved in any type of systematic sports training (control group). Subjects were classifi ed by the fi ve sexual maturity stages (Tanner, 1962). The percentage of body fat was estimated using Slaughter’s (1988) equation. The shuttle run test was used to determine VO2max (Léger, 1988). Two-way ANOVA and the Tukey post-hoc test were applied to the results of the dependent measures (p< 0.05). The soccer training group exhibited lower percentage body fat compared to the control group at Tanner Stages 1 (14.23±5.60 / 11.25±3.27) and 5 (12.52±4.20 / 15.57±3.56). The subjects in the training group exhibited signifi cantly higher VO2max (ml·kg-1·min-1) values than the control group (Stage 1: 52.75 ± 3.93 / 49.55 ± 2.58; Stage 2: 53.00±4.49 / 47.95±2.38; Stage 3: 54.32±3.29 / 48.36±2.30; Stage 4: 54.35±4.3 / 44.06±2.53; Stage 5: 53.24±3.78 / 39.69±4.84). These results suggest that the subjects engaged in systematic soccer training had superior levels of cardiorespiratory fi tness compared to those not engaged in any type sports training. RESUMO O propósito deste estudo foi comparar os valores de VO2máx e composição corporal durante a puberdade, em indivíduos do sexo masculino, praticantes e não praticantes de futebol. A amostra compreendeu 102 adolescentes praticantes de futebol sistematizado e 87 não praticantes, na faixa etária de 8 a 17 anos, separados conforme os cinco estágios de maturação sexual proposto por Tanner (1962). O percentual de gordura corporal foi estimado pela equação de Slaughter (1988). O VO2máx foi determinado a partir do teste de Léger (1988). Para tratamento estatístico utilizaram-se ANOVA´S (two-way) seguida pelo post-hoc de Tukey, com p

To compare times achieved in a 1,600m rural road run with the times predicted from critical speed, in additionto verify any association between critical speed and VO2max with the aerobic performance (1,600m time) of children. The sample consisted of 25 boys and 39 girls, aged 9 to 11 years. Their critical speeds were determined using the work versus time model, performed in the 200m and 800m maximum runs. The value of VO2max was measured using a 20-meter shuttlerun test. Endurance performance was determinate from the time obtained in a rural 1,600m road run. Statistical proceduresused were descriptive analyses, Student’s t test and Pearson’s moment correlation, with signifi cance level set at p RESUMO O estudo teve como objetivo comparar o tempo obtido na prova de 1.600m com o tempo predito pela velocidade crítica, bem como verifi car a associação da velocidade crítica e da potência aeróbia (VO2máx) com o desempenho aeróbio (tempo 1.600m) em crianças. A amostra foi composta de 25 meninos e 39 meninas, com faixa etária entre 9 a 11 anos, classifi cadas nos estágios de maturação sexual 1 e 2 de Tanner. A velocidade crítica foi obtida pelo modelo de avaliação trabalho versus tempo, na realização de dois tiros máximos de 200m e 800m. O VO2máx foi obtido através do teste de vai-vem de 20m. O desempenho aeróbio foi obtido através do tempo de percurso em uma prova rústica de 1.600m. Utilizou-se a estatística descritiva, teste “t” student e a correlação de Pearson, adotando p