W. Larry Kenney, PhD, is a professor of physiology and kinesiology at Pennsylvania State University in University Park, Pennsylvania. He received his PhD in physiology from Penn State in 1983. Working at Noll Laboratory, Kenney is currently researching the effects of aging and elevated cholesterol on the control of blood flow in human skin and has been continuously funded by NIH since 1983. He has also studied the effects of heat, cold, and dehydration on various aspects of health, exercise, and athletic performance as well as the biophysics of heat exchange between humans and the environment. He is the author of some 200 papers, books, book chapters, and other publications.

Kenney served as president of the American College of Sports Medicine from 2003 to 2004. He is a fellow of the American College of Sports Medicine and of the American Academy of Kinesiology and Physical Education and a member of the American Physiological Society.

For his service to the university and his field, Kenney has been awarded Penn State University’s Faculty Scholar Medal, the Evan G. and Helen G. Pattishall Distinguished Research Career Award, and the Pauline Schmitt Russell Distinguished Research Career Award. He was awarded the American College of Sports Medicine’s New Investigator Award in 1987 and the Citation Award in 2008.

Kenney has been a member of the editorial and advisory boards for several journals, including Medicine and Science in Sports and Exercise, Current Sports Medicine Reports (inaugural board member), Exercise and Sport Sciences Reviews, the Journal of Applied Physiology, Human Performance, Fitness Management, and ACSM’s Health & Fitness Journal (inaugural board member). He is also an active grant reviewer for the National Institutes of Health and many other organizations. He and his wife, Patti, have three children, all of whom are or were college athletes: Matt (Cornell football), Alex (Penn State football and track), and Lauren (Penn State track).

Jack H. Wilmore, PhD, is the Margie Gurley Seay Centennial professor emeritus in the department of kinesiology and health education at the University of Texas at Austin. He retired in 2003 from Texas A&M University as a distinguished professor in the department of health and kinesiology. From 1985 to 1997, Wilmore was the chair of the department of kinesiology and health education and the Margie Gurley Seay Endowed Centennial professor at the University of Texas at Austin. Prior to that, he served on the faculties at the University of Arizona, the University of California, and Ithaca College. Wilmore earned his PhD in physical education from the University of Oregon in 1966.

Wilmore has published 53 chapters, more than 320 peer-reviewed research papers, and 15 books on exercise physiology. He was one of five principal investigators for the Heritage Family Study, a large multicenter clinical trial investigating the possible genetic basis for the variability in the responses of physiological measures and risk factors for cardiovascular disease and type 2 diabetes to endurance exercise training. Wilmore’s research interests have included determining the role of exercise in the prevention and control of both obesity and coronary heart disease, determining the mechanisms accounting for alterations in physiological function with training and detraining, and factors limiting the performance of elite athletes.

A former president of the American College of Sports Medicine, Wilmore was the recipient of the American College of Sports Medicine’s Honor Award in 2006. In addition to serving as chair for many ACSM organizational committees, Wilmore served on the United States Olympic Committee’s Sports Medicine Council and chaired their Research Committee. He is currently a member of the American Physiological Society and a fellow and former president of the American Academy of Kinesiology and Physical Education. Wilmore has served as a consultant for several professional sports teams, the California Highway Patrol, the President’s Council on Physical Fitness and Sport, NASA, and the U.S. Air Force. He has also served on several journal editorial boards.

In his free time, Wilmore enjoys Bible study, running, walking, and playing with his grandchildren. He and his wife, Dottie, have three daughters (Wendy, Kristi, and Melissa) and sons-in-law and seven grandchildren.

David L. Costill, PhD, is the emeritus John and Janice Fisher chair in exercise science at Ball State University in Muncie, Indiana. He established the Ball State University Human Performance Laboratory in 1966 and served as its director for over 32 years.

Costill has written and coauthored more than 425 publications over the course of his career, including 6 books and articles in both peer-reviewed and lay publications. He served as the original editor in chief of the International Journal of Sports Medicine for 12 years. Between 1971 and 1998, he averaged 25 U.S. and international lecture trips each year. He was president of the ACSM from 1976 to 1977, a member of its board of trustees for 12 years, and a recipient of ACSM Citation and Honor Awards. Many of his former students are now leaders in the field of exercise physiology.

Costill received his PhD in physical education and physiology from Ohio State University in 1965. He and his wife, Judy, have two daughters, Jill and Holly. In his leisure time, Costill is a private pilot, auto and experimental airplane builder, competitive masters swimmer, and ex-marathon runner.