Learn how sport influenced Rainer Martens’s life and his epiphany to become a physical educator and coach, which led him to study sport psychology. The author briefly recounts his work in sport psychology and coaching education. Next, the author describes how he stumbled into publishing, founding Human Kinetics, and describes how this company helped define kinesiology and influence the broad field of physical activity. The author concludes by reporting on his continued involvement in sport and the development of two community centers that focus on sport and physical activity.