Abstract
Summary Objective The purpose of this study is to examine differences in visual and audial reaction times after the consumption of various doses of caffeine. Methods By means of a double-blind experimental design, changes in reaction times were observed with regard to various caffeine doses (100 mg or ∼ 3 mg·kg− 1) and different times from consumption (30 min or 60 min). The research sample consisted of 28 (15 men, 22.2 ± 0.8 years old; 13 women, 22.6 ± 1.7 years old) sports active students. The levels of simple and choice reaction times on visual stimuli and audial reaction times were monitored. Results The results showed a significant decrease in audial reaction time after 30 min and 60 min, and in choice reaction time after 60 min in the case of 100 mg of caffeine consumption. Furthermore, the influence of a higher dose (∼ 3 mg·kg− 1) of caffeine was also apparent. Conclusion Based on these results, it is possible to conclude that increasing amounts of caffeine can cause a decrease in visual and audial reaction times. These results may be useful in everyday human activities (extensive time driving a car) as well as being useful to sports coaches in preparation for sports where both audial and visual reaction times play an important role in overall sport performance (swimming, athletics, combat sports).
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