Trial reportNutrients2019
The Acute Effect of Various Doses of Caffeine on Power Output and Velocity during the Bench Press Exercise among Athletes Habitually Using Caffeine.
Trial report in Nutrients, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 3 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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
28 citing papers in PubMed, 3 syntheses or guidelines pooled it, 42 citations in OpenAlex.
- Caffeine Use in Sport: A Systematic Review and Meta-analysis of Acute Side Effects and Implications for Athlete Health and Safety.Sports medicine (Auckland, N.Z.) · 2026Pooled it
- Effects of caffeine intake on exercise performance in basketball players: a systematic review and meta-analysis.Frontiers in nutrition · 2026Pooled it
- Effects of acute caffeine intake on muscular power during resistance exercise: a systematic review and meta-analysis.Frontiers in nutrition · 2025Pooled it
- Effects of Acute Caffeine Ingestion on Morning Temperature, Mood, Reactive Agility and Cognitive Measures in Males: A Standardized Approach.Nutrients · 2026Trial
- Effects of Caffeine Ingestion on Morning Cognitive and Muscle Strength Measures in Males: A Standardized Approach.Nutrients · 2026Trial
- Preliminary Research towards Acute Effects of Different Doses of Caffeine on Strength-Power Performance in Highly Trained Judo Athletes.International journal of environmental research and public health · 2022Trial
- Acute effects of two caffeine doses on bar velocity during the bench press exercise among women habituated to caffeine: a randomized, crossover, double-blind study involving control and placebo conditions.European journal of nutrition · 2022Trial
- Can 3 mg·kgNutrients · 2021Trial
- The effects of different doses of caffeine on maximal strength and strength-endurance in women habituated to caffeine.Journal of the International Society of Sports Nutrition · 2021Trial
- Caffeine-Induced Effects on Human Skeletal Muscle Contraction Time and Maximal Displacement Measured by Tensiomyography.Nutrients · 2021Trial
- Placebo Effect of Caffeine on Maximal Strength and Strength Endurance in Healthy Recreationally Trained Women Habituated to Caffeine.Nutrients · 2020Trial
- Acute Caffeine Intake Enhances Mean Power Output and Bar Velocity during the Bench Press Throw in Athletes Habituated to Caffeine.Nutrients · 2020Trial
- The Effect of Caffeine on the Velocity of Half-Squat Exercise during the Menstrual Cycle: A Randomized Controlled Trial.Nutrients · 2019Trial
- The Effects of High Doses of Caffeine on Maximal Strength and Muscular Endurance in Athletes Habituated to Caffeine.Nutrients · 2019Trial
- High-Dose Caffeine Mouth Rinse Is an Effective Strategy for Isokinetic Strength Generation in Soccer Players.Journal of human kinetics · 2026Article
- Coffee Versus Caffeine as Ergogenic Aids: Biological and Methodological Distinctions with Implications for Exercise Performance and Recovery.Nutrients · 2026Review
- Body fat percentage is a key factor in elevated plasma levels of caffeine and its metabolite in women.PeerJ · 2025Article
- Muscle contraction time after caffeine intake is faster after 30 minutes than after 60 minutes.Journal of the International Society of Sports Nutrition · 2024Article
- Gender Differences in the Frequency of Positive and Negative Effects after Acute Caffeine Consumption.Nutrients · 2023Article
- Coffee intake and risk of diabetic nephropathy: a Mendelian randomization study.Frontiers in endocrinology · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundPreviously studies confirm ergogenic effects of caffeine (CAF); however there is no available scientific data regarding the influence of acute CAF intake on power output in athletes habitually consuming CAF. The main goal of this study was to assess the acute effect of 3, 6, 9 mg/kg/b.m. doses of CAF intake on power output and bench press bar velocity in athletes habitually consuming CAF.
methodsThe study included 15 healthy strength-trained male athletes (age = 26.8 ± 6.2 years, body mass = 82.6 ± 9.7 kg; BMI = 24.8 ± 2.7; bench press 1RM = 122.3 ± 24.5 kg). All participants were habitual caffeine consumers (5.2 ± 1.2 mg/kg/b.m.; 426 ± 102 mg of caffeine per day). This study had a randomized, crossover, double-blind study design where each participant performed four different experimental sessions, with one week interval between each trial. In every experimental session participants performed bench press, three sets of five repetitions at 50% 1RM. The power output and bar velocity assessments under four different conditions: a placebo (PLAC), and three doses of caffeine ingestion: 3 mg/kg/b.m. (CAF-3), 6 mg/kg/b.m. (CAF-6) and 9 mg/kg/b.m. (CAF-9).
resultsThe statistical significance was set at
conclusionThe results of the present study indicate that acute doses of CAF before exercise does not have a significant effect on power output and bar velocity in a group of habitual caffeine users.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.