Resumo. ABSTRACT The aim of this research is to analyze, through a confirmatory factorial design, the relationships between sports practice, interest, frequency and reasons why university students practice sports. In order to respond to this objective, a descriptive, explanatory and correlational research is presented, a Likert scale of own authorship is applied, structured in five dimensions and 28 items, which was validated by an exploratory factor analysis. The research was applied to a sample of 1185 undergraduate university students from first to fourth year, all of them students of an Andalusian university. The results obtained show that sport practices and interest in sport have a strong relationship, as well as this and reasons for practicing a sport, while between frequency with which they practice a sport and the reasons for not practicing have hardly any relationship.