Coingestion of carbohydrate with protein does not further augment postexercise muscle protein synthesis

Jul 5, 2007American journal of physiology. Endocrinology and metabolism

Adding carbohydrate to protein does not increase muscle protein building after exercise

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Abstract

Plasma insulin responses were significantly greater in the PRO + HCHO group at 18.4 +/- 2.9 U.6 h(-1) x l(-1) compared to the PRO + LCHO and PRO groups.

  • Muscle protein synthesis rates did not significantly differ between the protein-only and carbohydrate-protein combinations after resistance exercise.
  • Plasma glucose levels increased over time in both carbohydrate-containing groups, but not in the protein-only group.
  • The plasma glucose rate of appearance and disappearance was substantially higher in the PRO + HCHO group compared to both PRO and PRO + LCHO.
  • Whole body protein metabolism markers, including breakdown and synthesis rates, remained consistent across all experimental conditions.

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