Caffeine Supplementation Improves the Cognitive Abilities and Shooting Performance of Trained E-sports Players

Study Overview
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Brief Summary
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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.

Official Title
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Graduate Program in Department of Exercise Health Science, National Taiwan University of Sport

Conditions
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Caffeine, Placebo

Intervention / Treatment
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* Behavioral: caffeine


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: had experience with national competitions and regularly underwent training in first-person shooters Exclusion Criteria: no experience with national competitions and regularly underwent training in first-person shooters have any diseases affecting the heart, bones, and joints or diseases that preclude exercise

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 50 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: caffeine<br>capsules with 3 mg/kg of caffeine | Behavioral: caffeine<br>* 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.<br>|
| Placebo Comparator: placebo<br>The placebo capsule contained flour | Behavioral: caffeine<br>* 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.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Stroop task | The color-word Stroop task and visual search test were conducted using Psych/Lab for Windows. The reaction time (millisecond) were recorded. | 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. | 1 hour after intervention | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| aim trainer | Participants used the mouse to shoot the electronic targets on the computer screen. The completed time (second) were recorded. | 1 hour after intervention | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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caffeine, reaction time