The Claim
A 14-hour overnight fast enhances anaerobic performance by 10% and muscular endurance by 24% in trained men, as measured by the Running-Based Anaerobic Sprint Test and repetitions to failure in leg and bench press exercises.
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.
Trained men who fast for 14 hours overnight show a 10% increase in anaerobic performance and a 24% increase in muscular endurance during high-intensity exercise tests.
See the scientific wording
A 14-hour overnight fast enhances anaerobic performance by 10% and muscular endurance by 24% in trained men, as measured by the Running-Based Anaerobic Sprint Test and repetitions to failure in leg and bench press exercises, suggesting that short-term fasting may improve high-intensity exercise capacity in this population.
After a 14-hour fast, the body switches to burning fat and ketones for energy, which reduces the buildup of acid in muscles during intense exercise. This lets muscles contract harder and longer without getting tired as quickly, improving sprint power and the number of repetitions someone can do.
What the research says
1 studyAfter going 14 hours without eating, trained men could sprint better and do more push-ups and squats than when they ate normally—exactly as the claim says.
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.