The Claim
Caffeine ingestion at a dosage of 6 mg/kg does not significantly improve peak muscle torque at contraction velocities between 120 and 240 degrees per second in male cyclists.
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.
Taking 6 mg of caffeine per kilogram of body weight does not increase the maximum force produced by muscles during fast contractions in male cyclists.
See the scientific wording
Caffeine ingestion at 6 mg/kg does not significantly improve peak muscle torque at medium to high contraction velocities (120–240 degrees/s) in male cyclists, suggesting its ergogenic effect on cycling performance is not mediated by increased muscle strength.
Caffeine blocks a natural signal in muscles and nerves that slows down activity. This makes slow-twitch muscle fibers work more efficiently during slow or moderate movements, helping a person pedal longer without getting as tired. But during fast pedaling, fast-twitch fibers do most of the work, and caffeine does not affect them the same way, so muscle power doesn't increase even though performance improves.
What the research says
1 studyCaffeine helped cyclists ride faster, but the study didn’t measure if their legs got stronger during fast pedaling. Since they still got faster without stronger muscles, it suggests caffeine works by making them feel less tired or more alert, not by boosting muscle power.
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.