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Sodium L-Aspartate Supplementation Improves Repeated-Sprint Performance.

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Sodium L-aspartate supplementation partially enhanced repeated-sprint performance, specifically peak cadence. However, it did not significantly impact mean power output or blood pH levels in healthy males.

Keywords:
acid-base balanceamino acidaspartatesprint performance

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Area of Science:

  • Exercise Physiology
  • Nutritional Biochemistry
  • Sports Science

Background:

  • Aspartate supplementation is theorized to improve endurance by enhancing the tricarboxylic acid cycle.
  • The specific impact of aspartate on repeated-sprint ability and acid-base balance requires further investigation.

Purpose of the Study:

  • To investigate the effects of sodium L-aspartate supplementation on repeated-sprint performance.
  • To assess the impact of aspartate on blood pH levels during intense exercise.

Main Methods:

  • A double-blind study involving fourteen healthy males performing three sets of 10 maximal sprints.
  • Participants consumed either sodium L-aspartate (ASP) or a placebo (PLA) twice daily (2 × 4.5 g).
  • Measurements included exercise performance metrics (cadence, power output) and blood variables (pH, plasma amino acids).

Main Results:

  • Plasma aspartate concentrations were significantly higher in the ASP group during exercise.
  • Peak cadence during the second sprint set was significantly higher in the ASP group (p < 0.05).
  • A trend towards higher peak power output and blood pH was observed in the ASP group, though not statistically significant.

Conclusions:

  • Sodium L-aspartate supplementation demonstrated a partial improvement in repeated-sprint performance, specifically in peak cadence.
  • Aspartate supplementation did not significantly enhance mean power output during repeated sprints.
  • The study suggests a limited ergogenic effect of aspartate on high-intensity, intermittent exercise performance and acid-base regulation.