Evidence map›Paper›PMID 27757591›Full record

SynthesisEuropean journal of nutrition2017

Acute effects of caffeine-containing energy drinks on physical performance: a systematic review and meta-analysis.

Diego B Souza, Juan Del Coso, Juliano Casonatto, Marcos D Polito

Abstract readMeta-AnalysisSystematic Review
PubMed Publisher
In one paragraph

Synthesis in European journal of nutrition, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 77 papers, 15 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
77citing papers in PubMed, 15 pooled it
–field-weighted citation impact
1 · What the graph read from 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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

77 citing papers in PubMed, 15 syntheses or guidelines pooled it.

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  11. Acute caffeine supplementation in combat sports: a systematic review.Journal of the International Society of Sports Nutrition · 2018
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  15. Effects of caffeine intake on muscle strength and power: a systematic review and meta-analysis.Journal of the International Society of Sports Nutrition · 2018
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17 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Diego B SouzaDepartment of Physical Education, Londrina State University, Londrina, Brazil.
Juan Del CosoExercise Physiology Laboratory, Camilo José Cela University, Madrid, Spain.
Juliano CasonattoCenter of Life Sciences and Health, University of North Paraná, Londrina, Brazil.
Marcos D PolitoDepartment of Physical Education, Londrina State University, Londrina, Brazil. marcospolito@uel.br.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeCaffeine-containing energy drinks (EDs) are currently used as ergogenic aids to improve physical performance in a wide variety of sport disciplines. However, the outcomes of previous investigations on this topic are inconclusive due to methodological differences, especially, in the dosage of the active ingredients and the test used to assess performance.

methodsWe performed a systematic review and meta-analysis of published studies to evaluate the effects of acute ED intake on physical performance. The search for references was conducted in the databases PubMed, ISI Web of Knowledge and SPORTDiscus until December 2015.

resultsThirty-four studies published between 1998 and 2015 were included in the analysis. Using a random-effects model, effect sizes (ES) were calculated as the standardized mean difference. Overall, ED ingestion improved physical performance in muscle strength and endurance (ES = 0.49; p < 0.001), endurance exercise tests (ES = 0.53; p < 0.001), jumping (ES = 0.29; p = 0.01) and sport-specific actions (ES = 0.51; p < 0.001), but not in sprinting (ES = 0.14; p = 0.06). The meta-regression demonstrated a significant association between taurine dosage (mg) and performance (slope = 0.0001; p = 0.04), but not between caffeine dosage (mg) and performance (slope = 0.0009; p = 0.21).

conclusionED ingestion improved performance in muscle strength and endurance, endurance exercise tests, jumping and sport-specific actions. However, the improvement in performance was associated with taurine dosage.

Indexed as

Athletic PerformanceEnergy DrinksCaffeineExerciseHumansMuscle StrengthPhysical EnduranceSports Nutritional Physiological PhenomenaCaffeineCaffeinePerformance-enhancing substancesSportsTaurine

Identifiers

PMID27757591

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.