Análise do Questionário Internacional de Atividade Física em adolescentes
ABSTRACT Os objetivos deste estudo foram verificar o nível de atividade física habitual (AFH) e analisar o IPAQ em suas formas curta (FC) e longa (FL), em escolares da rede pública (PU) e privada (PR). A amostra foi de 102 adolescentes, 27 meninas (F) (=15,6±0,84 anos) e 27 meninos (M) ( =15,9±0,83 anos) da PU, e 23 F ( =15,9 ±0,85 anos) e 25 M ( =15,7±0,74 anos) da PR. As FC e FL foram comparadas intra-sexo (IS), inter-sexo (RS) e inter-redes (IR). Anova + post hoc Tukey demonstrou diferença estatisticamente significativa (p<0,05) entre a FC e FL RS com as F sendo mais ativas com a FC na PU. A comparação IS entre FC e FL foi estatisticamente significativa (p<0,05) com os M mais ativos na FL na PU. A análise IR exibiu diferença estatisticamente significativa (p<0,05) na FC para os M, com os da PR sendo mais ativos. Entre diferentes categorias de atividades evidenciou-se que a PU tem sua maior AFH em atividades laborativas (AL) e domésticas (D) e a PR em atividades de lazer (LZ). Tais resultados permitem-nos concluir que: a) existem diferenças nos resultados do IPAQ entre suas FC e FL; b) alunos da PU exibem as AL e D como predominantes em suas AFH, enquanto os alunos da PR apresentam predominância das LZ. Campanhas de incentivo ao aumento da AFH nas escolas devem ter enfoques de acordo com a rede de ensino.
Full-textDOI: · Available from: Paulo Amorim, May 28, 2015
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ABSTRACT: To examine whether body fat content in pre-pubertal children is influenced by physical activity related energy expenditure (AEE) and/or more qualitative aspects of physical activity. Cross-sectional study. 101 pre-pubertal children were examined in Study 1: (age: 5.3 +/- 0.9 y; weight: 20.2 +/- 3.6 kg). In Study 2: 68 of the original children were re-examined (age: 6.3 +/- 0.9 y; weight: 23.6 +/- 5.0 y). Fat mass (FM) and fat free mass (FFM) were determined by bioelectrical resistance and skinfolds; AEE was estimated from the difference between total energy expenditure (TEE) by doubly labeled water and post-prandial resting energy expenditure (REE) by indirect calorimetry; qualitative information on activity was derived by questionnaire. AEE was significantly correlated with FFM (r = 0.32 in both Studies) and body weight (r = 0.28 in Study 1; r = 0.29 in Study 2), but not FM. There were no significant relationships between AEE and any of the variables from the activity questionnaire in children (including TV time, playing time, and an accumulated activity index in h/week). After adjusting for FFM, age, and gender, FM was inversely related to activity time in h/week (partial r = -0.24 in Study 1; partial r = -0.32 in Study 2) but not AEE (P > 0.5). After adjusting for FFM, age, and gender, a small portion of the variance in body fat mass in children (approximately 10%) is explained by time devoted to recreational activity, whereas none of the variance is explained by the combined daily energy expenditure related to physical activity.International Journal of Obesity 04/1997; 21(3):171-8. DOI:10.1038/sj.ijo.0800383 · 5.39 Impact Factor
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ABSTRACT: It has been nearly 50 y since Mayer and coworkers hypothesized that the mechanisms controlling energy balance are accurate in persons with high levels of physical activity, but that in sedentary persons there is a threshold of physical activity below which these mechanisms become imprecise and that this leads to obesity. This hypothesis, however, was relatively untested in humans because of the difficulty of measuring total energy expenditure (TEE). The development of the doubly labeled water method has obviated this problem and we have now begun to test the Mayer hypothesis in humans. A review of cross-sectional data from doubly labeled water studies in adults provided support for the Mayer hypothesis in men but not in women. Men with TEE > approximately 1.75 times the resting metabolic rate (RMR) had lower body mass indexes than did those with lower expenditures. Further support for the hypothesis was obtained from a longitudinal study of previously obese women. Women with ratios of TEE to RMR > approximately 1.75 gained less weight than did those with lower energy expenditures. When a subset of the less active women was placed in an exercise program that increased TEE:RMR to 1.75, weight gain was arrested. Weight gain resumed when the exercise program ended. The doubly labeled water method now makes it possible to quantitatively and objectively test a hypothesis proposed almost 50 y ago. Results generally support the Mayer hypothesis of a threshold of physical activity that protects against weight gain.American Journal of Clinical Nutrition 10/1998; 68(4):956S-961S. · 6.92 Impact Factor
American Journal of Clinical Nutrition 4(2):169-75. · 6.92 Impact Factor