About the Author
E. Paul Roetert, PhD, is the Chief Executive Officer of the American Alliance for Health, Physical Education, Recreation and Dance (AAHPERD), where he is responsible for promoting leadership, research, education, and best practices in the professions that support creative, healthy, and active lifestyles. Mark S. Kovacs, PhD, is the Senior Manager of Sport Science and Coaching Education for the United States Tennis Association (USTA). He was a collegiate All-American and NCAA doubles champion at Auburn University. After playing professionally, he pursued his graduate work performing tennis-specific research and has a graduate degree in exercise science and a PhD in exercise physiology.