Michael L. Teague received his doctorate in exercise science, health, and recreation from the University of Northern Colorado. He has been a professor in sport, health, and leisure at the University of Iowa since 1975, and he teaches courses in health, performance nutrition, and sports and recreation management for the Department of Health and Human Physiology. He has also developed and taught online courses on personal health, nutrition, and health promotion. Dr. Teague received the Outstanding Teacher Award from the University of Iowa in 1993-1994, and also holds a secondary appointment with the College of Public Health. He has authored several books about health promotion and aging as well as books about aging and leisure. Dr. Teague has served as a health observer for the U.S. State Department in East Timor, an advisory committee member for Healthy People 2000, a taskforce member for Women's Health in Iowa, and a health promotion grant reviewer for the National Institutes of Health, the Canadian Fitness and Lifestyle Research Institute, and the Canadian Diabetes Association. He was the director of a 26-part video series titled Healthy Living: Road to Wellness, used in distance learning and campus health courses across the United States. This series received 22 national and international video awards. In addition, Dr. Teague was the co-producer for The Victories of Dan Gable, which aired on HBO Signature in 1999. In his leisure time, Mike enjoys golf, racquetball, basketball, wallyball, and running. Sara L. C. Mackenzie, M.D., M.P.H., completed medical school at the University of California-Davis and residency in family medicine at the University of Washington in Seattle. She obtained a master's degree in public health from the University of Washington. Dr. Mackenzie provides direct care for students at the University of Washington student health center. In addition, she is a Senior Lecturer in the School of Public Health and teaches several undergraduate courses -- in large and small groups -- about health, wellness, and illness. As the University of Washington School of Public Health Assistant Dean for Undergraduate Education, she has developed course and program curricula and led workshops on teaching and learning. In addition, she has organized conferences to enhance communication between youth and health practitioners. She is the West Coast medical consultant for Job Corps, a vocational training program for youth that incorporates basic health care, wellness, and employability. Her husband, Paul, and two daughters, Lila and Sydda, fill her life with laughter and balance. Sara enjoys horseback riding and gardening with her family.