G. Gregory Haff, PhD, CSCS, *D, FNSCA, is a full professor and the course coordinator for the postgraduate degree in strength and conditioning at Edith Cowan University in Joondalup, Australia. Haff has published more than 150 articles, centering his research on performance effects in the areas of strength training, cycling, and nutritional supplementation.

Haff is a past president of the National Strength and Conditioning Association (NSCA) and a senior associate editor for the Journal of Strength and Conditioning Research. He was the United Kingdom Strength and Conditioning Association (UKSCA) Strength and Conditioning Coach of the Year for Education and Research and the 2011 NSCA William J. Kraemer Outstanding Sport Scientist Award winner. He is a certified strength and conditioning specialist with distinction (CSCS, *D), a UKSCA-accredited strength and conditioning coach (ASCC), and an accredited Australian Strength and Conditioning Association level 2 strength and conditioning coach.

Additionally, Haff is a national-level weightlifting coach in the United States and Australia. He serves as a consultant for numerous sporting bodies, including teams in the Australian Football League, Australian Rugby Union, Australian Basketball Association, and National Football League.

Charles Dumke, PhD, is a full professor and graduate program coordinator in the School of Integrative Physiology and Athletic Training at the University of Montana. He has taught both undergraduate and graduate courses in exercise physiology and sport nutrition for over 20 years. He earned his doctoral degree in kinesiology from the University of Wisconsin at Madison. His areas of interest in exercise science are energy expenditure, fuel utilization, economy of movement, mechanisms of mitochondrial adaptation, and diabetes. He has published more than 120 peer-reviewed articles.

In his free time, Dumke enjoys competing in triathlons, biking, running, taking on building projects with little know-how, and coaching his son in all sorts of sports.