The Claim
Beta-alanine supplementation at 65 mg/kg/day for four weeks in highly trained cyclists results in a statistically significant improvement in isokinetic power and fatigue index, with no statistically significant change in 4-minute cycling time trial performance.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In highly trained cyclists, taking 65 mg of beta-alanine per kilogram of body weight daily for four weeks improves muscle power and reduces fatigue during short bursts of effort, but does not improve performance in a 4-minute time trial.
See the scientific wording
Beta-alanine supplementation at 65 mg/kg/day for four weeks in highly trained cyclists produces a statistically significant improvement in isokinetic power and fatigue index but no significant change in 4-minute cycling time trial performance, indicating that benefits may be specific to isolated muscle contractions rather than integrated endurance performance.
Beta-alanine builds up a substance in muscles that soaks up acid produced during hard, repeated muscle efforts. This keeps the muscle environment from getting too acidic, so the muscle fibers can keep contracting strongly without slowing down. This effect helps in short bursts of power but doesn't improve sustained cycling because the acid buildup isn't the main limit during longer efforts.
What the research says
1 studyBeta-alanine helped cyclists’ legs produce more power during quick, repeated knee bends and made them less tired, but didn’t help them ride faster in a 4-minute race. So it helps with short bursts, not long rides.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.