Caffeine’s performance-enhancing effects depend on your genes…but also on exercise typestudy summary
In this meta-analysis of randomized controlled trials, the ergogenic effects of caffeine intake on exercise performance were influenced by CYP1A2 gene type; the AA allele of rs762551 was associated with significant improvements in cycling performance after caffeine intake.
Can using a caffeine-carbohydrate mouth rinse while fasting for Ramadan improve sprint performance?study summary
In this randomized crossover trial in male track-and-field athletes who were fasting for Ramadan, the participants covered a greater total distance in a repeated sprint workout after a caffeine-carbohydrate mouth rinse.