Barbara Bushman is certified as a program director and exercise specialist through the American College of Sports Medicine (ACSM) and is an associate professor at Southwest Missouri State University. She received her PhD in exercise physiology from the University of Toledo and has since focused her research efforts on the topic of women and exercise, along with the usefulness of various exercise modes including cross-training and deep-water run training. Her findings have been featured in numerous journals, publications, and presentations.Bushman also is a manuscript reviewer for ACSM's Medicine & Science in Sports & Exercise, and she is a member of the editorial board of The American Journal of Medicine & Sports. She has been a fellow of the American College of Sports Medicine since 1999, serving on the ACSM Media Referral Network and ACSM's Strategic Health Initiative on Women, Sport and Physical Activity, along with various other national and regional ACSM committees.Bushman resides in Springfield, Missouri, with her husband, Tobin, and participates in numerous activities in her leisure time, including running, cycling, hiking, lifting weights, and open-water kayaking.Janice Clark Young is an assistant professor in the health and exercise sciences program at Truman State University in Kirksville, Missouri, where she teaches health program planning, public health, and environmental and consumer health. She earned her doctorate in health education from the University of Kansas and is a nationally certified health education specialist (CHES).In addition to serving as a reviewer for six different health textbooks, Young also wrote the Instructor's Manual for Hales' Invitation to Fitness and Wellness. She is a member of the American Alliance for Health, Physical Education, Recreation and Dance and the American Association for Health Education. In 2003 she was the recipient of the College Teaching Award at Southwest Missouri State University.Young resides in Kirksville, Missouri, with her husband, Frank. She enjoys a range of physical activities including swimming and water sports, horseback riding, walking, and hiking.The American College of Sports Medicine (ACSM) is more than the world's leader in the sports medicine and exercise science-it is an association of people and professions exploring the use of that science and physical activity to make life healthier for all people. Since 1954, ACSM has been committed to the promotion of physical activity and the diagnosis, treatment, and prevention of sport-related injuries. With more than 20,000 international, national, and regional chapter members in 80 countries, ACSM is internationally known as the leading source of state-of-the-art research and information on sports medicine and exercise science. Through ACSM, health and fitness professionals representing a variety of disciplines work to improve the quality of life for people around the world through health and fitness research, education, and advocacy. A large part of ACSM's mission is devoted to public awareness and education about the positive aspects of physical activity for people of all ages from all walks of life. ACSM's physicians, researchers, and educators have created tools for the public, ranging in scope from starting an exercise program to avoiding or treating sport injuries. ACSM's National Center is located in Indianapolis, Indiana, widely recognized as the amateur sports capitol of the nation. To learn more about ACSM, visit www.acsm.org.