topicCaffeine Exercise Performance Meta-Analysis
claimConsistent with these findings, in-competition urine monitoring data show that median urinary caffeine concentration in aquatics increased from 0.1 µg/mL in 2004 to 0.7 µg/mL in 2015 [], suggesting an increase in caffeine use.
evidence level1
citationWang Ziyu (2026)
sourceCaffeine makes a splash: a systematic review and multilevel meta-analysis exploring the effects of caffeine intake on swimming performance
topicCaffeine Exercise Performance Meta-Analysis
claimAvailable evidence supports caffeine’s ergogenic effects in various sports disciplines and competitive scenarios [,].
evidence level1
citationWang Ziyu (2026)
sourceCaffeine makes a splash: a systematic review and multilevel meta-analysis exploring the effects of caffeine intake on swimming performance
topicCaffeine Exercise Performance Meta-Analysis
claimThis imprecision reflects the very limited evidence base, as the analyses were based on only two studies for the 25-m distance and three studies for the 50-m distance.
evidence level1
citationWang Ziyu (2026)
sourceCaffeine makes a splash: a systematic review and multilevel meta-analysis exploring the effects of caffeine intake on swimming performance
topicCaffeine Exercise Performance Meta-Analysis
claim1 2 3 4 5 5 6 7 8 9 10 11 The main objective in competitive swimming is to complete the race as quickly as possible [].
evidence level1
citationWang Ziyu (2026)
sourceCaffeine makes a splash: a systematic review and multilevel meta-analysis exploring the effects of caffeine intake on swimming performance
topicCaffeine Exercise Performance Meta-Analysis
claimThis study examined the effects of caffeine consumption on endurance exercise performance, and the influence of CYP1A2 gene polymorphisms in caffeine pharmacokinetics and exercise performance.
evidence level4
citationMasters C (2026)
sourceThe Effect of CYP1A2 Gene Polymorphisms on Caffeine Pharmacokinetics and Exercise Performance in Male Recreational Athletes.
topicCaffeine Exercise Performance Meta-Analysis
claimThe data sets of two randomised, double blind, placebo-controlled crossover study design experiments have been merged.
evidence level4
citationMasters C (2026)
sourceThe Effect of CYP1A2 Gene Polymorphisms on Caffeine Pharmacokinetics and Exercise Performance in Male Recreational Athletes.