Introdução: Diferenças relacionadas ao peso e às habilidades motoras em crianças em idade escolar ainda apresentam controvérsias. Objetivo: Analisar a relação entre desenvolvimento motor e nível de atividade física com o índice de massa corporal (IMC) de escolares com excesso de peso. ABSTRACT Introduction:In school-age children, differences in weight and motor skills are still controversial. Objective: To analyze the relation between motor development, level of physical activity, and body mass index (BMI) in children with overweight. Methods: 85 students of both genders, aged 6 to 10 years, living in Presidente Prudente, São Paulo, Brazil, were evaluated. The instruments used were: the classification of BMI/age, the Motor Development Scale and the Modified and Adapted Questionnaire of Level of Physical Activity. The sample was divided into two groups: the overweight group (OWG) was composed of 50 students with nutritional diagnosis of overweight and obesity; the normal weight group (NWG) was composed of 35 eutrophic students. The following tests were used for statistical analysis: Shapiro Wilk (data normality), Student's t test or Mann-Whitney (independent samples), Spearman's test (correlation) and χ 2 test (proportion), with significance level set at p<0.05. Results: The OWG had significantly lower results for general motor development (91.32±10.68 versus 97.14±9.06; p=0.010), fine motricity (93.21±21.59 versus 103.1±13.12; p=0.0138) and gross motricity (90.31±23.54 versus 112.6±16.07; p=0.0001). A significant positive correlation was found between level of physical activity and motor development in OWG subjects in the domains balance (0.35080; p=0.0125) and spatial organization (0.41820; p=0.0025). Conclusion: When OWG is compared to NWG, results are inferior for general motricity, fine motricity, and gross motricity.

The aim of this study was to verify the respiratory muscle strength (RMS) of healthy adolescents, and compare it with predicted normal values. It wasevaluated62adolescents, being 48 female and 14 male, average ageof 18.24±0.43 years, by means of the International Physical Activity Questionnaire (IPAQ) and FMR by manovacuometry by measuring Inspiratory Maximum Pressure (PiMáx) and Expiratory (PeMáx). Data were analyzed by Mann Whitney's t test, unpaired t-test and chi-square test. Regarding the IPAQ, 13 individuals were insufficiently active, 31 active and 18 very active. The values of RMS were different from those predicted, being observed by the increase in the mean of the female PiMáx and the reduction in the male, in addition to the decrease of the PeMáx in both sexes. It was verified that the sample presented RMS impairment, which can impact on the health of this population, being a warning sign, besides recommending future analyzes of the predicted values established.