The Claim
A single acute dose of caffeine at 0.003 g/kg body weight has no significant effect on muscular endurance during six sets of chest press or knee extension at 70% of one-repetition maximum in young, resistance-trained adults.
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.
A small dose of caffeine equivalent to 0.003 grams per kilogram of body weight does not increase muscular endurance during six sets of chest press or knee extension at 70% of a person's one-repetition maximum.
See the scientific wording
A single acute dose of caffeine at 0.003 g/kg body weight does not significantly improve muscular endurance during six sets of chest press or knee extension at 70% of one-repetition maximum in young, resistance-trained adults, suggesting this dosage is insufficient to enhance performance in short-duration, high-repetition resistance protocols.
Caffeine blocks signals in the brain that normally slow down muscle activity, but at this low dose, it does not increase muscle activation or make the person feel less tired, so performance stays the same.
What the research says
1 studyThis study gave people a small amount of caffeine before they lifted weights and found it didn’t help them do more reps. So, the caffeine didn’t make them stronger or more endurance during their workout.
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.