The Claim
A single 300 mg dose of caffeine ingested one hour before morning resistance training increases average velocity and mean propulsive velocity by 3.3–9.2% during bench press and back squat at submaximal loads (40–80% 1RM) in young, low-caffeine males.
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 300 mg of caffeine one hour before a morning workout increases the speed and power output of bench press and back squat movements at moderate weights in young men who rarely consume caffeine.
See the scientific wording
A single 300 mg dose of caffeine ingested one hour before morning resistance training increases average velocity and mean propulsive velocity by 3.3–9.2% during bench press and back squat at submaximal loads (40–80% 1RM) in young, low-caffeine males, indicating enhanced movement speed and power output.
Caffeine blocks a natural brain chemical that slows down nerve signals, making the brain send stronger signals to the muscles. This makes the person feel less tired and allows them to push the weight faster, even when the weight isn't heavy.
What the research says
1 studyThis study found that young men who don’t usually drink caffeine moved the bar faster during squats and bench presses after taking a 300 mg caffeine pill an hour before lifting — exactly what 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.