Objective:To identify the association between both, body mass index and aerobic fitness,
with cardiovascular disease risk factors in children.Methods:Cross-sectional study, carried out in Itaúna-MG, in 2010, with 290 school children
ranging from 6 to 10 years-old of both sexes, randomly selected. Children from
schools located in the countryside and those with medical restrctions for physical
activity were not included. Blood sample was collected after a 12-hour fasting
period. Blood pressure, stature and weight were evaluated in accordance with
international standards. The following were considered as cardiovascular risk
factors: high blood pressure, high total cholesterol, LDL, triglycerides and
insulin levels, and low HDL. The statistical analysis included the Spearman's
coefficient and the logistic regression, with cardiovascular risk factors as
dependent variables.Results:Significant correlations were found, in both sexes, among body mass index and
aerobic fitness with most of the cardiovascular risk factors. Children of both
sexes with body mass index in the fourth quartile demonstrated increased chances
of having high blood insulin and clustering cardiovascular risk factors. Moreover,
girls with aerobic fitness in the first quartile also demonstrated increased
chances of having high blood insulin and clustering cardiovascular risk factors.
Conclusion:The significant associations and the increased chances of having cardiovascular
risk factors in children with less aerobic fitness and higher levels of body mass
index justify the use of these variables for health monitoring in Pediatrics.
Com o objetivo de propor um método didático mais eficiente para a resolução de inequações produto-quociente, o presente trabalho baseou-se nos pensamentos em educação matemática de Ávila (2003) e da semiótica de Duval (2012) para aprimorar didaticamente o método apresentado por Bloch (1993) desenvolvido há mais de duas décadas. Este método, que foi apresentado de maneira muito formal à época, não foi popularizado, e assim, continua o paradigma da utilização do método convencional (quadro de sinais) até os dias atuais. Os resultados mostram que, com abordagem didática mais elaborada, simples e intuitiva dos conceitos, é possível mostrar que o método, denominado aqui de método da reta única, é viável e mais eficiente em relação ao método convencional com o auxílio de representações gráficas, criando-se assim, uma possibilidade real de convencimento dos professores de matemática com uma forma moderna de tratar esse tema atualmente e para as gerações futuras.
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