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Amino acids and endurance exercise.

M H Hargreaves1, R Snow

  • 1School of Health Sciences, Deakin University, Burwood, 3125, Australia.

International Journal of Sport Nutrition and Exercise Metabolism
|March 20, 2001
PubMed
Summary
This summary is machine-generated.

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Active individuals may need more dietary protein, as amino acid use during exercise is minimal. Supplementing with BCAAs or glutamine offers no proven benefits for performance or immune function.

Area of Science:

  • Exercise Physiology
  • Nutritional Biochemistry

Background:

  • Skeletal muscle can oxidize amino acids, but utilization is low during fed, carbohydrate-replete exercise.
  • The source of amino acids for oxidation (free pool vs. protein breakdown) is debated.

Purpose of the Study:

  • To evaluate the impact of amino acid ingestion on exercise performance and related physiological markers.
  • To assess the ergogenic potential of branched-chain amino acids (BCAAs) and glutamine.

Main Methods:

  • Review of existing literature on amino acid utilization during exercise.
  • Analysis of controlled studies investigating BCAA and glutamine supplementation.

Main Results:

  • BCAA ingestion showed no significant effect on fatigue during prolonged exercise.

Related Experiment Videos

  • Limited evidence supports glutamine for immune function enhancement.
  • Glutamine with carbohydrates did not improve muscle glycogen synthesis beyond carbohydrates alone.

    • Conclusions:

    • Current evidence does not support routine amino acid supplementation for active individuals.
    • Dietary protein requirements may need adjustment for athletes, but specific amino acid supplements lack proven benefits.