Interventions that are evidence informed and co-created with end-users are more likely to be effective, but injury prevention programs have typically been developed by experts only. In the quest to reduce injuries among young handball players, researchers have developed a holistic injury prevention intervention that puts the end-users, including players, coaches, and club administrators, at the heart of the solution. This holistic approach encourages engagement, self-management, and motivation, making injury prevention accessible, effective, and tailored to the needs of young athletes and their teams.