Beta-alanine improves sprint performance in endurance cycling

Area of Science:

• Exercise Physiology
• Nutritional Supplementation

Background:

• Chronic beta-alanine (betaALA) supplementation elevates muscle carnosine, enhancing short-duration maximal exercise performance.
• Endurance competition success often hinges on the ability to sprint effectively at the conclusion of the event.

Purpose of the Study:

• To investigate the ergogenic potential of 8-week betaALA supplementation on sprint performance in cyclists following a simulated endurance cycling race.
• To determine if betaALA administration can improve the capacity for a final sprint after prolonged exertion.

Main Methods:

• A double-blind, placebo-controlled study involving 8-week supplementation with betaALA (4 g/day) or placebo in moderately to well-trained cyclists (n=17).
• Participants completed a 110-minute simulated cycling race followed by a 10-minute time trial and a 30-second isokinetic sprint, assessed pre- and post-supplementation.
• Blood lactate and pH levels were monitored to assess metabolic responses.

Main Results:

• While time trial performance remained unaffected, betaALA supplementation significantly increased peak power output by 11.4% and mean power output by 5.0% during the final sprint compared to placebo.
• No significant differences in blood lactate or pH were observed between the betaALA and placebo groups, suggesting a non-metabolic mechanism for performance enhancement.

Conclusions:

• Oral beta-alanine supplementation effectively enhances sprint performance following exhaustive endurance exercise in cyclists.
• BetaALA may be a valuable ergogenic aid for athletes needing to perform high-intensity efforts at the end of endurance events.