Carbohydrate-protein coingestion improves multiple-sprint running performance

Distance covered decreased by 4.2% and maximal speed by 6.1% in the final 15 minutes of exercise.

• Carbohydrate-protein ingestion may lead to a moderate improvement in distance covered and maximal speed during exercise.
• Average running speed declined significantly in the carbohydrate trial, while protein potentially provided a small improvement.
• No differences were observed between carbohydrate and carbohydrate-protein beverages in body mass, plasma volume change, urine volume, heart rate, gut fullness, perceived exertion, blood glucose, or serum insulin.
• Blood urea concentration increased significantly in the carbohydrate-protein trial compared to the carbohydrate trial.

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