SPRINTING IN THE HEAT NOT EFFECTED BY CHO INTAKE
Roti, M. W., Hatch, J. L., Sutherland, J. W., Mahood, N. V., Clements, J. M., Seen, A. D., Fiala, K. A., Casa, D. J., Armstrong, L. E., & Maresh, C. M (2002). Influences of exogenous carbohydrate ingestion on running performance and physiological variables in the heat. Medicine and Science in Sports and Exercise, 34(5), Supplement abstract 767.
Male runners (N = 10) were dehydrated by food and water restriction overnight and then further dehydrated to ~-4% of bodyweight through exercise. During 45 minutes of recovery, Ss consumed one liter of carbohydrate (6%) or placebo drinks. A 75-min run at 65% VO2max followed in a dry-bulb ~31 degrees Celsuis environment. That was followed by a final sprint at 90% VO2max.
Sprint performance was similar in both conditions. Most blood variables were similar between conditions.
Implication. Rehydration with CHO or placebo produced similar performance and blood responses in sprint performance after aerobic work.
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