The practice of physical activity is fundamental in the prevention of chronic non-transmissible diseases; the present study was carried out in order to determine if the age sociodemographic variables, gender and commune negatively influence the levels of physical activity of schoolchildren aged 9 to 13 at the Carlos Pérez Escalante School in the city of Cúcuta, taking into account the information obtained through a sociodemographic survey and the PAQ-C questionnaire, and thus establishing their relationship. The objective is Analyze the sociodemographic influence on the levels of Physical Activity in schoolchildren from 9 to 13 years of the Carlos Pérez Escalante School of Cúcuta in the year 2019. This study presents a quantitative approach, in which the PAQ-C was used to measure levels of physical activity and a sociodemographic survey to obtain age, gender and commune data from schoolchildren; It is also a type of descriptive and analytical study that allows the relationship between physical activity levels and socio-demographic data to be established. According to the survey, 66 per cent of the participants were from Táchira State, Venezuela; with regard to gender, it was observed that girls participated more, with a percentage of 51.3 per cent. The female gender and the ages between 11 and 13 have a negative impact on the physical activity levels of schoolchildren. Taking into account the data obtained in this investigation, the largest percentage of the sample rated as very sedentary or inactive in relation to the physical activity performed in the last seven days, it is clear that physical inactivity among schoolchildren is increasing, making schoolchildren more vulnerable to long-term or short-term chronic non-communicable diseases.