Trial reportNutrients2023
Effects of Different Doses of Caffeine Supplementation on Collegiate Male Volleyball Players' Specific Performance and Skills: A Randomized, Double-Blind, Placebo-Controlled, Crossover Study.
Trial report in Nutrients, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 5 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
17 citing papers in PubMed, 5 syntheses or guidelines pooled it.
- Effects of acute caffeine supplementation on physical, physiological, and sport-specific performance in female volleyball players: a systematic review and three-level meta-analysis.Frontiers in nutrition · 2026Pooled it
- A systematic review and meta-analysis of the evidence on the acute effects of caffeine on sport-specific skills, physical performance, and physiological function in female basketball players.Frontiers in nutrition · 2026Pooled it
- Effects of Nutritional Supplements on Explosive Lower Limb Performance in Volleyball Players: A Systematic Review and Network Meta-Analysis.Nutrients · 2025Pooled it
- Effects of Caffeine Supplementation on Exercise Performance in Volleyball Players: A Systematic Review and Meta-Analysis.Nutrients · 2025Pooled it
- Effects of Acute Ingestion of Caffeine Capsules on Muscle Strength and Muscle Endurance: A Systematic Review and Meta-Analysis.Nutrients · 2024Pooled it
- Individual responses to encapsulated caffeine and caffeine chewing gum on strength and power in strength-trained males.Journal of the International Society of Sports Nutrition · 2025Trial
- The effects of mental fatigue and caffeine on basketball performance: insights from a crossover study.Journal of the International Society of Sports Nutrition · 2025Trial
- The effect of repeated coffee mouth rinsing and caffeinated gum consumption on aerobic capacity and explosive power of table tennis players: a randomized, double-blind, placebo-controlled, crossover study.Journal of the International Society of Sports Nutrition · 2024Trial
- Caffeine Enhances Some Aspects of Physical Performance in Well-Trained Hammer and Discus Throwers.Nutrients · 2024Trial
- Examining the impact of differing caffeine dosages in conjunction with plyometric training on physiological adaptations in basketball players.Scientific reports · 2024Trial
- Review
- Caffeine and human performance: from molecular mechanisms to exercise and recovery.Frontiers in physiology · 2026Review
- The effect of low dose caffeine powder supplementation on serve speed, spike speed, and speed-endurance in elite sitting volleyball players: a randomized double-blind crossover study.BMC sports science, medicine & rehabilitation · 2025Article
- Combined Effects of Postactivation Performance Enhancement and Caffeine Intake on Explosive and Anaerobic Power in Recreationally Active Males.Current developments in nutrition · 2025Article
- Effects of Acute Caffeine Ingestion on Physical Performance and Skill Execution in Volleyball Players: A Systematic Review and Meta-Analysis.International journal of exercise science · 2025Article
- Effects of progressiveFrontiers in nutrition · 2025Article
- Effect of Off-Season Iron Supplementation on Aerobic Capacity of Female Handball Player: A Randomized, Double-Blinded, Placebo-Controlled Study.Current developments in nutrition · 2024Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe improvement of performance and skill indices of volleyball players can affect their success rate. Therefore, the present study aimed to evaluate the effects of acute caffeine supplementation of varied doses on collegiate volleyball players' specific performance and skills.
methodThis research was a randomized, double-blind, crossover design study in which 15 male volleyball players aged 18 to 25 years participated voluntarily. Participants were randomly placed in three different conditions, including 3 mg of caffeine per kilogram of body weight (C3), 6 mg of caffeine per kilogram of body weight (C6), and a placebo (PLA) with a one-week wash-out period between exercise trials. The supplement was taken 60 min before each exercise session. Ball throwing, hand movement speed, agility, Sargent's jump and handgrip, and attacking and serving skill tests were measured and analyzed to check the performance and skill of the volleyball players.
resultsThis study showed a significant increase in agility test in C6 compared with the PLA condition (
conclusionsIn conclusion, the findings of the current study suggested that a higher dose of caffeine compared with a lower dose may be more effective in movements requiring lower-body explosive power and the ability to change direction. Also, according to the findings, it seems that caffeine can lead to the improvement of complex skills, such as serving and attacking in volleyball.
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