Gupta, R. G., Wingertzahn, M. A., Cioffi, C., Wapnir, R. A., & Otto, R. M. (2000). The effect of a complex carbohydrate-glycerol beverage compared to Gatorade and water on cycle performance. Medicine and Science in Sports and Exercise, 32(5), Supplement abstract 1142.

Elite male cyclists (N = 10) performed two 60-min rides at 75% VO2max on a Pro Compu Trainer followed by a 3.2 km time trial. Ss ingested water, Gatorade, or a complex carbohydrate-glycerol beverage. Fluids were given as 500 ml at 30-min preexercise, and 250 ml at 0, 20, and 40 minutes during exercise.

The carbohydrate-glycerol treatment produced significantly lower average plasma lactate and heart rates than the other two conditions. RPE was also significantly lower at the end of the 60-min portion of the exercise. Fluid loss was significantly less in the Gatorade and carbohydrate-glycerol conditions than in the water condition. Time-trial performances were fastest for the carobhydrate-glycerol group but the differences were not significant.

Implication. A carbohydrate-glycerol solution has a positive effect on endurance performance.

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