Effects of Carbohydrate Supplementation during Intense training on Dietary Patterns, Psychological Status, and Performance

in International Journal of Sport Nutrition and Exercise Metabolism
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The purpose of this study was to determine the effects of carbohydrate supplementation during intense training on dietary patterns, psychological status, and markers of anaerobic and aerobic performance. Seven members of the U.S. National Field Hockey Team were matched to 7 team counterparts (N = 14). One group was blindly administered a carbohydrate drink containing 1 g·kg−1 of carbohydrate four times daily, while the remaining group blindly ingested a flavored placebo during 7 days of intense training. Subjects underwent pre- and posttraining aerobic and anaerobic assessments, recorded daily diet intake, and were administered the Profile of Mood States (POMS) psychological inventory prior to and following each practice. Results revealed that the carbohydrate-supplemented group had a greater (p < .05) total energy intake, carbohydrate intake, and change (pre vs. post) in time to maximal exhaustion following training while reporting less postpractice psychological fatigue. However, no significant differences were observed in remaining psychological, physiological, or performance-related variables.

R.B. Kreider is with the Department of Human Movement Sciences & Education, The University of Memphis, Memphis, TN 38152. D. Hill and B. Anders are with the Department of Intercollegiate Athletics, and G. Horton, M. Downes, and S. Smith ae with the Department of Health, Physical Education and Recreation, Old Dominion University, Norfolk, VA 23529.