The Claim
Acute ingestion of caffeine at a dose of 5 mg/kg during resistance exercise produces consistent ergogenic effects across multiple muscle groups, including the chest, legs, and back, indicating a systemic physiological mechanism.
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 5 mg of caffeine per kilogram of body weight before a weight workout increases strength and performance equally in the chest, legs, and back, suggesting the effect is throughout the body rather than limited to specific muscles.
See the scientific wording
The ergogenic effects of acute caffeine ingestion (5 mg/kg) during resistance exercise are consistent across multiple muscle groups, including the chest, legs, and back, suggesting a systemic rather than localized physiological mechanism.
Caffeine blocks signals in the brain that make exercise feel hard, so the body pushes harder during lifts without getting more tired, and this happens the same way whether lifting with the chest, legs, or back.
What the research says
1 studyCaffeine helped people do more reps and feel less tired during chest, leg, and back exercises, meaning it boosts performance all over the body—not just in one area.
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.