Özet:

The aim of this research was to determine the influence of Body Mass Index (BMI) on a speed test performance of school children. Through a descriptive evaluated four groups (T1, T2, T3, T4), with a total of 116 children, 62 male (M) and 54 females (F) aged 7 and 9 years old, students from the third year of elementary education at a publicschool in São Caetano do Sul-SP. As instrumentation, we measure the height and weight in order to verify the BMI and correlate with the speed test, in which we used the test protocol of 20 meters. With the data, we analyzed the students according to their division in the school (for classes), we found no significant difference (p <0.05) in age, BMI, height, weight and speed between the two groups, except between the T2 and T3 classes to the variable speed. When considering gender, the boys were faster than girls, but this was not the factor that caused the T3 to be faster than the T2, and the division between boys and girls was equivalent to consider the classes. However, the note about the optical percentile of body mass index found that students who were in the stratification of overweight and obesity had the lowest performance in speed,regardless of gender or age. This seems to have been determinant for the performance of T3, there mind that it had no stratificationwithin the school for being overweight. We concluded that there is a strong relationship between body composition determined by BMI and physical capacity speed in elementary school-age children.

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