The Effect of Free Glutamine and Peptide Ingestion on the Rate of Muscle Glycogen Resynthesis in Man

The rate of glycogen resynthesis was measured at 28 ± 5, 26 ± 6, 33 ± 4, and 34 ± 3 mmol glucosyl units × kg(-1) dry weight muscle × h(-1) for the control, glutamine, wheat hydrolysate, and whey hydrolysate drinks, respectively.

• Ingestion of a glutamine and carbohydrate mixture does not increase glycogen resynthesis in muscle.
• Plasma glutamine levels decreased by approximately 20% with the control drink but showed a two-fold increase with free glutamine drinks.
• The glycogen resynthesis rates were higher after wheat (21 ± 8%) and whey hydrolysate (20 ± 6%) ingestion compared to control and free glutamine drinks.
• No significant differences in glycogen resynthesis rates were found among the four tested drinks.

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