The International Journal of Sport Nutrition and Exercise Metabolism published by Human Kinetics has examined whether carbohydrate-protein ingestion influences muscle glycogen metabolism during short-term recovery from exhaustive treadmill running and subsequent exercise.

Six endurance-trained individuals underwent two trials in a randomised double-blind design, each involving an initial run-to-exhaustion at 70% VO_2max (Run-1) followed by 4-hour recovery and subsequent run-to-exhaustion at 70% VO_2max (Run-2).

Beverages were ingested at 30-min intervals during recovery, one group had a drink consuming carbohydrate-protein (0.8 g carbohydrate·kg body mass [BM^-1]·h^-1 plus 0.4 g protein·kg BM^-1·h^-1) this we will call CHO-P. The other had isocaloric carbohydrate (1.2 g carbohydrate·kg BM^-1·h^-1) which we will call CHO.

The results found that the addition of protein did not alter muscle glycogen utilisation or time to fatigue during repeated exhaustive running.

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