The document discusses challenges with active video games (AVGs) not providing enough physical activity or benefits generalizing. It introduces self-determination theory, which found supporting autonomy, competence, and relatedness increases intrinsic motivation and engagement. An augmented fantasy sports pilot integrated traditional fantasy sports with activity trackers, finding it significantly increased physical activity and was more enjoyable than traditional versions. This shows how self-determination theory principles can inform designing technologies to foster healthier behaviors and motivation.