Predição do baixo desempenho motor por meio de indicadores antropométricos em crianças de oito a 10 anos

This study aimed to analyze the predictive capacity and possible cut-off points of anthropometric indicators in the lower motor performance prediction in both sexes. The study included 350 students (186 girls and 164 boys) from eight to 10 years old. Three schools participated in the survey, two public schools and a private school located in the city of Manaus, AM. The evaluated anthropometric indicators were: Body Mass Index (BMI), waist circumference (WC), waist Height Ratio (WHtR) and, to evaluate the motor tasks, it was used the Movement Assessment Battery for Children - Second Edition (MABC-2) and Korperkoordination Test fur Kinder (KTK). The Receiver Operating Characteristic (ROC) curve was used to estimate the predictive capacity of anthropometric indicators (BMI, WC and WHtR), pointing out the best cut-off point for the low motor performance prediction. It was possible to note predictive capacity of anthropometric indicators in KTK battery in the overall sample (p <0.001) and, when the sample was stratified by sex, there was predictive capacity by BMI indicator in boys and girls (p=0,006 and p=0,012, respectively), in the same way as the WC indicator (p=0,012 and p<0,001, respectively). And the anthropometric indicator WHtR presented predictive capacity only for girls (p <0.001). In MABC-2, no significant differences were found. The anthropometric indicators (BMI, WC, WHtR) have predictive capacity in some KTK tasks, but they did not show prediction for the low motor performance in MABC-2.