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OBJECTIVEThe main aim of this research project was to measure the effects of physical activity on corporal composition (BMI and waist circumference) on spirometric values and relate these indicators to the respiratory/ventilator function.MATERIAL AND METHODSThe sample consisted of 86 individuals, higher education students, with an average age of 21.3 ± 2.4 years, who were divided into two groups: the control group consisted of 28 sedentary subjects (20.9 ± 1.3 years), and the experimental group consisting of 58 subjects (21.5 ± 2.8 years) who undertook supervised exercise. To characterize the sample of the type of physical activity, we used an adaptation of the questionnaire Telama et al.19 We assessed the value of spirometry (PEF, FVC and FEV₁) with a Microquark Cosmed spirometer and the BMI and waist circumference. The figures obtained were processed with the S.P.S.S. 19.0, the t-test, the Levene test, the Mann-Whitney test and the Spearman correlation test, adopting a significance level of 5%.RESULTSThe experimental group achieved significantly better BMI and waist circumference results (p = 0.05) and in all of the values assessed by spirometry (PEF, FVC and FEV₁) compared to the control group. We also found that there is a tendency for a negative correlation between the values of body composition and spirometric values, only observable in some variables (PEF, FEV₁), i.e., the higher the values of body composition, the lower the spirometric values.CONCLUSIONThe students that performed supervised exercise had higher levels of body composition and lung function. Poor BMI and waist circumference values may lead to respiratory dysfunction in terms of ventilation and the respective lung volumes, limiting the practice of physical activity and increasing the probability of respiratory pathologies.

Atividade Física e Função Respiratória: Análise da Composição Corporal e dos Valores Espirométricos