The aim of this study was to evaluate the influence of body mass index in the postural balance of school children. Casecontrol study involving 128 students from six to nine years, divided in the case (over weight) and control (eutrophic) groups, each with 64 people. Evaluation of static and dynamic balance was accessed by Fonseca´s Psychomotor Battery; body mass was calculated by BMI. Statistical analysis was d...