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Kruskall, Laura J. Ph.D., R.D., CSSD, FACSM; Miracle, Amy M.A., M.S., R.D., CSSD

doi: 10.1249/FIT.0b013e3181bcd865

LEARNING OBJECTIVE • Fitness professionals will likely have clients who wish to use caffeine as an ergogenic aid or to enhance metabolism. This article should help the fitness professional understand caffeine's mechanism of action, the doses and timing of caffeine that may lead to a performance benefit, and the effects of caffeine on energy expenditure and, thus, its role as a metabolism booster in weight management.

In light of the onslaught of caffeinated beverages available today, this article summarizes the potential ergogenic effect of caffeine and the role it plays in energy metabolism.

Laura J. Kruskall, Ph.D., R.D., CSSD, FACSM, is an associate professor, director of Nutrition Sciences, and the director of the Didactic Program in Dietetics and the Dietetic Internship at University of Nevada, Las Vegas. In addition, she is a fellow of the American College of Sports Medicine, a registered dietitian, a board-certified specialist in sports dietetics, and holds a certification in Adult Weight Management from the American Dietetic Association. Her areas of expertise are sports nutrition, weight management, and medical nutrition therapy. Her research interests include the effects of nutrition or exercise intervention on body composition and energy metabolism. In addition to her duties at the university, Dr. Kruskall is a certified ACSM Health/Fitness Specialist, and is a nutrition consultant for Canyon Ranch Spa Club and Cirque du Soleil in Las Vegas.

Amy Miracle, M.A., M.S., R.D., CSSD, is a lecturer with the Department of Kinesiology and Nutrition Sciences at University of Nevada, Las Vegas. She is a registered dietitian and aboard-certified specialist in sports dietetics who focuses her efforts and research on sports nutrition, specifically, sports nutrition knowledge and behavior of collegiate athletes. In addition, she provides the University of Nevada, Las Vegas, Athletics Department with nutrition support via team nutrition education sessions and individual consulting. Ms. Miracle also works with endurance athletes looking to improve performance through developing personalized training diets and optimizing nutritional recovery.

© 2009 American College of Sports Medicine