OBJECTIVE:To develop a physical activity questionnaire aimed at Brazilian adolescents and to assess its validity and reproducibility. METHODS:A total of 94 adolescents (30 males and 64 females) aged 11-16 years were included in the study, which was conducted in 2004. The questionnaire comprised 17 questions on habitual physical activity in the last 12 months (15 questions on sports and physical exercise and two on transportation physical activity), and was standardized to yield final scores for weekly and yearly activity. As a reference, we used the multistage 20-meter shuttle run test, measuring variables maximum time in minutes, maximum speed, maximum oxygen uptake and maximum heart rate. For validity analysis, we used the Spearman coefficient and age-adjusted correlation. For reproducibility analysis, we repeated evaluations after 15 days and measured the intraclass correlation coefficient. RESULTS:For the weekly score, the highest correlations were obtained for maximum time for the entire sample (r=0.19), maximum speed for males (r=0.20), and both maximum oxygen uptake and maximum time for females (r=0.17). For the yearly score, the highest correlations were obtained for maximum time for the entire sample (r=0.30), maximum heart rate for males (r=0.22), and maximum time for females (r=0.23). In reproducibility analyses, correlations were 0.61 for weekly score and 0.68 for yearly score. CONCLUSIONS:The questionnaire was valid and reproducible. Its use is recommended for the evaluation of physical activity in epidemiological studies with adolescents.

OBJECTIVE:To develop a physical activity questionnaire aimed at Brazilian adolescents and to assess its validity and reproducibility. METHODS:A total of 94 adolescents (30 males and 64 females) aged 11-16 years were included in the study, which was conducted in 2004. The questionnaire comprised 17 questions on habitual physical activity in the last 12 months (15 questions on sports and physical exercise and two on transportation physical activity), and was standardized to yield final scores for weekly and yearly activity. As a reference, we used the multistage 20-meter shuttle run test, measuring variables maximum time in minutes, maximum speed, maximum oxygen uptake and maximum heart rate. For validity analysis, we used the Spearman coefficient and age-adjusted correlation. For reproducibility analysis, we repeated evaluations after 15 days and measured the intraclass correlation coefficient. RESULTS:For the weekly score, the highest correlations were obtained for maximum time for the entire sample (r=0.19), maximum speed for males (r=0.20), and both maximum oxygen uptake and maximum time for females (r=0.17). For the yearly score, the highest correlations were obtained for maximum time for the entire sample (r=0.30), maximum heart rate for males (r=0.22), and maximum time for females (r=0.23). In reproducibility analyses, correlations were 0.61 for weekly score and 0.68 for yearly score. CONCLUSIONS:The questionnaire was valid and reproducible. Its use is recommended for the evaluation of physical activity in epidemiological studies with adolescents.

O objetivo do presente estudo é analisar a associação entre as recomendações recebidas durante o atendimento pré-natal com a prática de atividade física na gestação. Trata-se de um estudo transversal com 290 puérperas. Apenas 9% das mulheres atingiam a recomendação (?150 minutos) de atividade física semanal para manutenção da saúde e 18% praticaram alguma atividade física no lazer (AFL)/exercício físico na gestação. A prática de atividade física anterior à gestação estava associada ao nível de AFL. Adicionalmente, a percepção da presença de recomendação do profissional para a prática de AFL no pré-natal triplicou a chance da mulher ser ativa, ainda que não suficientemente ativa. Ações junto aos profissionais de saúde podem promover modificações no nível de AFL durante a gestação.

ResumoObjetivo: Avaliar a validade do peso, estatura e Índice de Massa Corporal (IMC) referidos e sua confiabilidade para o diagnóstico do estado nutricional de adolescentes de Piracicaba. Métodos: Participaram do estudo 360 adolescentes de ambos os sexos, de escolas públicas de Piracicaba, com idade entre 10 e 15 anos. Os adolescentes autorelataram seu peso e estatura, sendo esses valores obtidos por medidas diretas, logo em seguida, pelos entrevistadores. A validade do IMC referido foi calculada segundo índices de sensibilidade, especificidade e valor preditivo positivo (VPP). Avaliou-se a concordância entre as categorias de IMC obtido por meio das medidas referidas e aferidas a partir do coeficiente kappa ponderado, coeficiente de correlação de Lin. e grá-ficos de Bland e Altman e Lin. Resultados: Verificou-se que tanto os meninos quanto as meninas subestimaram o peso (−1,0 meninas e meninos) e a estatura (meninas −1,2 e meninos −0,8) (p < 0,001). Os valores de IMC aferidos e referidos apresentaram uma concordância moderada. A sensibilidade do IMC referido para classificar os indivíduos obesos foi maior para os meninos (87,5%), enquanto a especificidade foi maior para as meninas (92,7%). O VPP foi elevado somente para a classificação da eutrofia. Conclusões: As medidas referidas de peso e estatura de adolescentes não representam medidas vá-lidas e, portanto, não devem ser usadas em substituição aos valores mensurados. Além disso, verificou-se que 10% dos meninos obesos e 40% das meninas obesas poderiam permanecer não identificados utilizando-se as medidas auto-referidas, confirmando a baixa validade das medidas auto-referidas. Palavras AbstractPurpose: To assess the validity and reliability of self-reported height, weight, and Body Mass Index (BMI) to diagnose the nutritional status of adolescents. Methods: The study included 360 public school students of both genders, with ages ranging from 10 to 15 years. Adolescents self-reported their weight and height, and these values were later obtained directly by interviewers. The validity of BMI based on self-reported measures was calculated using sensitivity and specificity indexes, and positive predictive value (PPV). Agreement between self-reported and measured BMI was evaluated using Kappa's weight coefficient, the Lin correlation coefficient, and Bland-Altman and Lin's plots. Results: Both girls and boys underestimated their weight (−1.0 girls and boys) and height (girls − 1.2 and boys − 0.8) (p < 0.001). BMI presented moderate agreement between measured and self-reported values. Sensitivity of estimated BMI based on reported measures to classify obese subjects was higher for boys (87.5%) than it was for girls (60.9%), whereas specificity was higher for girls (92.7%) than it was for boys (80.6%). PPV was high only for classification of normal-weight adolescents. Conclusions: Self-reported measures of weight and height in adolescents do not present valid measures; therefore, they should not be used to replace measured values. Additionally, we observed that 10% ...

Resumo O objetivo do presente estudo foi verificar os fatores determinantes do índice de massa corporal (IMC) de adolescentes matriculados nas escolas públicas de

Suplemento hidroeletrolítico favorece reidratação e diminui proteinúria pós-treino em atletas karate Introdução: Um adequado estado de hidratação durante a atividade esportiva é essencial para a manutenção da boa saúde, porém a relação entre hidratação, proteinúria e esportes é pouco estudada. Objetivo: analisar a influência de suplemento hidroeletrolítico (bebida esportiva isotônica) como estraté-gia de reidratação sobre o estado de hidratação e proteinúria após treino de Karate. Métodos: Dez atletas participaram deste estudo. Na primeira sessão de treino padronizado, denominada sessão de treino de observação (STO), os atletas se reidrataram segundo seus hábitos; na segunda sessão de treino padronizado, denominada sessão de treino de intervenção nutricional (STIN), foi seguido um protocolo ideal de prática de hidratação, utilizando-se de suplemento hidroeletrolítico como líquido reidratante durante o treino. O estado de hidratação foi verificado pelo monitoramento do peso corporal antes e após o treino, pela gravidade específica da urina pré e pós-treino e pelo volume urinário pós-treino. De forma a observar a influência da prática de hidratação sobre a função renal, a proteinúria pós-exercício foi medida. Resultados: Observou-se uma diferença estatisticamente significativa na densidade urinária entre as amostras coletadas pré e pós-exercício apenas na STIN (p = 0,047). Quando comparados entre sessões, houve menor variação ponderal (p = 0,011) e maior volume urinário (p < 0,001) no treino com intervenção nutricional. Na STO, houve um percentual mais elevado de atletas que apresentaram proteinúria (70%) em comparação a STIN (50%) na amostra de urina coletada após o treino. Conclusão: O uso de suplemento hidroeletrolitico como prática de hidratação por atletas de karate favoreceu a reidratação durante uma sessão de treino e reduziu a proteinúria pós-treino. ResumoPalavras-chave: desidratação, suplementos nutricionais; artes marciais; proteinúria.Introduction: Adequate hydration status in the sport is essential for good health, yet the relationship between hydration, proteinuria and sports is little studied. Objective: To analyze the influence of an isotonic sports drink as rehydration strategy on the hydration status and proteinuria after karate training. Methods: Ten athletes participated in this study. In the first session of standard training, called observation training session (STO), the athletes hydrated themselves according to their habits, and in the second session of standard training, called nutritional intervention training session (STIN), an ideal practice of hydration protocol was followed, using an isotonic sports drink as a rehydration liquid during the training. The hydration status was verified by monitoring the body weight before and after training, the urine specific gravity pre-and post-training and the urine volume post-training. To observe the influence of practice of hydration on the renal function post exercise proteinuria was measured. Results: We observed a statistically significant diff...

The scope of this study was to identify patterns of physical activity and sedentary behavior (PPASB) in adolescents enrolled in public schools and assess possible relationships between these patterns and overweight. This is a Cross-sectional study conducted in 2009, with the representative sample of adolescents enrolled in the fifth grade in public schools of Piracicaba, São Paulo (Brazil) consisted of 454 adolescents between 10 and 14 years of age. Physical activity, sedentary behavior and food intake information was collected through questionnaires. Anthropometric data were also collected (body mass and height). PPASB were identified through Principal Component Analysis. To characterize the association between PPASB and overweight, multiple binary logistic regression models were used. Out of 454 adolescents, 53.5% were female and 36.6% were overweight. Six PPASB were identified: 1) composed by volleyball and dance; 2) composed by soccer, video-game and computer; 3) composed by television and computer; 4) composed by dodge-ball and cycling; 5) composed by walking activity and 6) composed by gymnastics. The PPASB characterized by sedentary activities (television and computer) was associated with overweight (OR: 1.22, 95% CI: 1.02-1.46) after adjusted by sexual maturity, energy density and gender. In conclusions, taking a PPASB characterized mainly by spent time in front of the television and computer increases the chance of developing overweight.

The aim of this study was to describe interventions developed by Physical Education professionals (PEP) inserted in the Nuclei of Support to Family Health (NASF) in the state of São Paulo. A cross-sectional survey was conducted with 91PEP working in NASF of São Paulo, who answered by telephone. Data was analyzed descriptively (frequencies). Most participants were men with an average of 44 years of age. A greater part (96.7%) reported group sessions and shared sessions, independently of users health conditions. Gymnastics (76%) and walking (67%) were the most frequent activities. Most professionals did not intervene in school environments and did not participate in educational groups. The PEP mentioned the need for more spaces for the practice of physical activity, higher investment in interventions developed by the PEP prioritize the organization of physical activity groups in a shared environment, but are still missing the interventions in schools and broader educational activities.