Trial reportNutrients2018
Acute Caffeinated Coffee Consumption Does not Improve Time Trial Performance in an 800-m Run: A Randomized, Double-Blind, Crossover, Placebo-Controlled Study.
Trial report in Nutrients, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.
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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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
12 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Effects of Caffeine Intake on Endurance Running Performance and Time to Exhaustion: A Systematic Review and Meta-Analysis.Nutrients · 2022Pooled it
- Impact of Caffeine Intake on 800-m Running Performance and Sleep Quality in Trained Runners.Nutrients · 2019Trial
- Trial
- Acute Effects of a Low Dose of Caffeine on Physiological and Performance Factors in Young Male Soccer Players: A Randomized Crossover Study.Current developments in nutrition · 2026Article
- The Effect of Caffeine Supplementation on Female Volleyball Players' Performance and Wellness during a Regular Training Week.Nutrients · 2023Article
- International society of sports nutrition position stand: coffee and sports performance.Journal of the International Society of Sports Nutrition · 2023Article
- Development of a Caffeine Content Table for Foods, Drinks, Medications and Supplements Typically Consumed by the Brazilian Population.Nutrients · 2022Review
- Can We Quantify the Benefits of "Super Spikes" in Track Running?Sports medicine (Auckland, N.Z.) · 2022Article
- Connections between Different Sports and Ergogenic Aids-Focusing on Salivary Cortisol and Amylase.Medicina (Kaunas, Lithuania) · 2021Review
- Novel insights on caffeine supplementation, CYP1A2 genotype, physiological responses and exercise performance.European journal of applied physiology · 2021Review
- Caffeine and Exercise: What Next?Sports medicine (Auckland, N.Z.) · 2019Review
- Advances in Sport and Performance Nutrition.Nutrients · 2019Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionStudies evaluating caffeinated coffee (CAF) can reveal ergogenic effects; however, studies on the effects of caffeinated coffee on running are scarce and controversial.
aimTo investigate the effects of CAF consumption compared to decaffeinated coffee (DEC) consumption on time trial performances in an 800-m run in overnight-fasting runners.
methodsA randomly counterbalanced, double-blind, crossover, placebo-controlled study was conducted with 12 healthy adult males with experience in amateur endurance running. Participants conducted two trials on two different occasions, one day with either CAF or DEC, with a one-week washout. After arriving at the data collection site, participants consumed the soluble CAF (5.5 mg/kg of caffeine) or DEC and after 60 min the run was started. Before and after the 800-m race, blood pressure and lactate and glucose concentrations were measured. At the end of the run, the ratings of perceived exertion (RPE) scale was applied.
resultsThe runners were light consumers of habitual caffeine, with an average ingestion of 91.3 mg (range 6⁻420 mg/day). Time trial performances did not change between trials (DEF: 2.38 + 0.10 vs. CAF: 2.39 + 0.09 min,
conclusionCAF consumption failed to enhance the time trial performance of an 800-m run in overnight-fasting runners, when compared with DEC ingestion. In addition, no change was found in RPE, blood pressure levels, or blood glucose and lactate concentrations between the two trials.
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