The Claim
In male university rowers, the combined ingestion of 200 mg caffeine and 200 mg paraxanthine is associated with a 3.3-second faster 2000-meter rowing time and an 8 W higher mean power output compared to placebo under evening training conditions.
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.
Male university rowers who consumed 200 mg caffeine and 200 mg paraxanthine together rowed 2000 meters 3.3 seconds faster and produced 8 watts more average power than when they took a placebo during evening training.
See the scientific wording
In male university rowers, the combined ingestion of 200 mg caffeine and 200 mg paraxanthine is associated with a 3.3-second faster 2000-meter rowing time and a 8 W higher mean power output compared to placebo, suggesting a potential synergistic or additive ergogenic effect under evening training conditions.
Two compounds block signals that make the brain feel tired, which makes the brain send stronger signals to the muscles to push harder. One of these compounds also widens blood vessels in the muscles, letting more oxygen and fuel reach them during intense effort.
What the research says
1 studyWhen male rowers took both caffeine and paraxanthine together before racing, they rowed faster and pushed harder than when they took a fake pill. This suggests the two substances work better together than alone.
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.