Arterial hypertension (AH) is a disease that affects children and adolescents and its identification, helps to prevent the premature development of cardiovascular diseases. The objective of this study was to verify the presence of blood pressure (BP) above normal and to relate it to obesity and lifestyle of scholars in the cities of Bauru, Ibitinga, Jaú and São Sebastião. A total of 369 children and adolescents were evaluated. Information on health and physical exercise were obtained through anamnesis. After 5 minutes of rest, hemodynamic and anthropometric assessments were performed on each participant. Odds rate was used to assess the risk of above-normal blood pressure in overweight and inactive children. Pearson’s correlation was used to correlate anthropometric and hemodynamic variables. Among those evaluated, 28% had altered BP values and 29% were already overweight and obese. In addition, 89% of students were classified as insufficiently active. Among overweight scholars, 48% had altered BP and, among obese, BP was altered in 65%. Overweight children and adolescents had 3.59 times more risk to have altered BP. It can be concluded that the results are extremely relevant to reinforce the inclusion of different strategies in schools for the control of obesity and sedentary lifestyle, in order to avoid early cases of hypertension and cardiovascular diseases.