Purpose: investigators explored the effect of 3 mg/kg of caffeine supplementation on the cognitive ability and shooting performance of trained e-sports players. Methods: investigators recruited nine e-sports players who had received professional training in e-sports and had won at least eighth place in national-level e-sports shooting competitions. After performing three to five familiarization tests, investigators employed a randomized crossover design to divide participants into a caffeine trial (CAF) and a placebo trial (PL). The CAF group took capsules with 3 mg/kg of caffeine, whereas the PL group took a placebo capsule. After a 1-h rest, the Stroop task, visual search ability test, and the shooting ability test were conducted.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
9
we employed a randomized crossover design to divide participants into a caffeine trial (CAF) and a placebo trial (PL). The CAF group took capsules with 3 mg/kg of caffeine, whereas the PL group took a placebo capsule. After a 1-h rest, the Stroop task, visual search ability test, and the shooting ability test were conducted.
National Taiwan University of Sport
Taichung, Taiwan
Stroop task
The color-word Stroop task and visual search test were conducted using Psych/Lab for Windows. The reaction time (millisecond) were recorded.
Time frame: 1 hour after intervention
visual search test
A total of 80 search displays were presented in 5 minutes. In each display, 5, 10, 15, or 20 -Tests were presented. The reaction time (millisecond) were recorded.
Time frame: 1 hour after intervention
aim trainer
Participants used the mouse to shoot the electronic targets on the computer screen. The completed time (second) were recorded.
Time frame: 1 hour after intervention
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