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  • Title: Carbohydrate-electrolyte feedings and 1 h time trial cycling performance.
    Author: Desbrow B, Anderson S, Barrett J, Rao E, Hargreaves M.
    Journal: Int J Sport Nutr Exerc Metab; 2004 Oct; 14(5):541-9. PubMed ID: 15673100.
    Abstract:
    The effects of a commercial sports drink on performance in high-intensity cycling was investigated. Nine well-trained subjects were asked to complete a set amount of work as fast as possible (time trial) following 24 h of dietary (subjects were provided with food, energy 57.4+/-2.4 kcal/kg and carbohydrate 9.1+/-0.4 g/kg) and exercise control. During exercise, subjects were provided with 14 mL/kg of either 6% carbohydrate-electrolyte (CHO-E) solution or carbohydrate-free placebo (P). Results showed that subjects' performances did not greatly improve (time, 62:34+/-6:44 min:sec (CHO-E) vs. 62:40+/-5:35 min:sec (P); average power output, 283.0+/-25.0 W (CHO-E) vs. 282.9+/-29.3 W (P), P > 0.05) while consuming the sports drink. It was concluded that CHO-E consumption throughout a 1-h time trial, following a pre-exercise dietary regimen designed to optimize glucose availability, did not improve time or power output to a greater degree than P in well-trained cyclists.
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