摘要:The aim of this study has been to know if the hours of physical activity after school have a relationship with the daily intakes in teenagers, distinguishing the results by sex, age and parental education. The number of participants was n=627 (n=334 boys and n=299 girls) public institutes students of a city of the north of Spain. For the study they have been applied descriptive statistics tests, Contingency Tables, Phi Coefficient and Contingency Coefficients. The results show there are a high percentage of teenagers who play sports, 78%, principally boys. The 41% of students who play sports have a father who has a university degree too and the 47.2% have them his mother. The 38.5% of students who play sports after school do five daily intakes.