Beta-Alanine Supplementation Improved 10-km Running Time Trial in Physically Active Adults

Area of Science:

• Exercise Physiology
• Nutritional Biochemistry
• Sports Science

Background:

• Beta-alanine is a non-essential amino acid that acts as a precursor to carnosine.
• Carnosine is a dipeptide found in skeletal muscle that buffers hydrogen ions during high-intensity exercise.
• Supplementation with beta-alanine may increase muscle carnosine content, potentially improving exercise performance.

Purpose of the Study:

• To investigate the effects of beta-alanine supplementation on 10 km running time trial performance.
• To assess the impact of beta-alanine on blood lactate concentration following a 10 km running test.
• To determine if beta-alanine supplementation enhances endurance in physically active adults.

Main Methods:

• Sixteen healthy, physically active adults were randomized into beta-alanine (n=8) and placebo (n=8) groups.
• Participants supplemented with 5 g/day beta-alanine or placebo for 23 days, alongside a structured running training program.
• 10 km running time trial performance and post-exercise blood lactate levels were measured at baseline and after 23 days.

Main Results:

• The beta-alanine group showed a significant decrease in 10 km running time (p < 0.05).
• A statistically significant difference in performance improvement (delta time) was observed between the beta-alanine and placebo groups (p = 0.007).
• The beta-alanine group exhibited lower post-exercise blood lactate concentrations compared to the placebo group (p = 0.03).

Conclusions:

• Beta-alanine supplementation effectively improves 10 km running time trial performance in physically active adults.
• Supplementation with beta-alanine leads to a reduction in blood lactate concentration after strenuous exercise.
• Beta-alanine is a viable ergogenic aid for enhancing endurance capacity in runners.