This study’s aim was to explore the link between cardiorespiratory fitness and executive functions, as moderated by the type of sport practice by Swiss children from ages 8 to 12. To do so, children were assessed on 9 different cognitive tasks, 3 for each executive functions, respectively: inhibition, working memory and cognitive flexibility. They were also assessed on cardiorespiratory fitness through a multistage test, and the information on which type of sport they were practicing outside of school was retrieved as well. Our main hypothesis was that the impact of cardiorespiratory fitness on executive functions would be moderated by the type of sport practiced, with children taking part in open-skill and mixed sports would have higher executive functions as their cardiorespiratory fitness improved, compared to children participating in closed-skill or in no sport at all. Results showed a moderator effect on inhibition with the mixed group having better inhibition as cardiorespiratory fitness improved compared to the other groups that had a negative relationship.