Underserved youths are affected by a variety of circumstances such as poverty, poor nutrition, and low physical activity levels. While many extended-day physical activity programs exist, few focus on the importance of health and wellness. The purpose of this article is to describe the development of an extended-day program for underserved youths that emphasizes fitness, nutrition, and personal and social responsibility. The Nu-Fit Club not only taught and empowered youths, it also provided preservice teachers with teaching, assessment, and management skills. (Contains 2 figures.)