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Effects of Caffeine on Chess Performance and Cognitive Function in Professional Chess Players

RecruitingNAAges 18 Years - 50 YearsAllSt. Louis University
NCT07641335 on ClinicalTrials.gov ↗
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In plain words

What the trial is, and whether it could suit you

This study will examine whether caffeine improves cognitive and competitive performance in professional chess players during tournament-style games. In a randomized double-blind crossover design, participants will complete two experimental sessions in which they consume either caffeinated coffee or decaffeinated coffee before playing a standardized chess match. Cognitive performance will be assessed using attention and reaction-time tests, including the Stroop Test, Trail Making Test, and Puzzle Rush task. Chess performance outcomes such as move accuracy, time management, and error rates will also be evaluated. The study aims to determine whether moderate caffeine intake enhances focus, alertness, and decision-making during prolonged competitive chess play.

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📋 Eligibility rules (as published)
Inclusion Criteria: * Male and female professional chess players aged 18-50 years * Current Fédération Internationale des Échecs (FIDE) standard rating between 2300 and 2600 Elo, or achievement of a standard FIDE rating within this range during the previous 12 months * Habitual caffeine consumers consuming ≤2 cups of coffee per day * Willingness to comply with all study procedures and study visits * Ability to provide written informed consent Exclusion Criteria: * Non-caffeine users * Habitual caffeine intake exceeding 2 cups of coffee per day * Cardiovascular disorders * Metabolic disorders * Psychiatric disorders * Pregnancy or breastfeeding * Current smoking * Shift workers * Use of psychoactive medications * Participation in another clinical trial within the previous 3 months * Known allergy or intolerance to milk proteins, dairy products, or soy * Known red-green color blindness or other color vision deficiencies that may interfere with Stroop Test performance
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What it tests

  • Caffeinated Coffee
  • Decaffeinated Coffee Placebo
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Where

1 site
Saint Louis University
St Louis, United States
🤝 Taking part is your choice, and you can leave at any time. Only the trial team can confirm you are eligible — always decide together with your own doctor.
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