Youth mental health challenges are rising globally, yet one of the most accessible youth-serving systems — sport— remains underutilized as a public health strategy. This Stress, Trauma, and Resilience (STAR) Seminar explores how insights from developmental neuroscience, trauma research, and sport-based youth development can transform everyday sport experiences into environments that promote regulation, connection, and resilience. Drawing on the Neurosequential Model and the Nothing Heals Like Sport playbook, the presentation examines how relationships, movement, and manageable stress interact to support healthy brain development and emotional regulation in young people. Participants will explore how sport environments can shift stress from overwhelming to tolerable, enabling learning, skill development, and social connection. The seminar highlights practical coaching strategies that translate brain science into accessible practices such as predictable routines, relational safety, and developmentally appropriate challenges. Together, these approaches position youth sport as a powerful upstream intervention for mental health and community wellbeing.