Evidence map›Paper›PMID 30935142›Full record

SynthesisNutrients2019

Effects of Creatine Supplementation on Athletic Performance in Soccer Players: A Systematic Review and Meta-Analysis.

Juan Mielgo-Ayuso, Julio Calleja-Gonzalez, Diego Marqués-Jiménez, Alberto Caballero-García, Alfredo Córdova, Diego Fernández-Lázaro

Abstract readMeta-AnalysisSystematic Review
PubMed Full text at PMC Publisher
In one paragraph

Synthesis in Nutrients, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers, 10 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
49citing papers in PubMed, 10 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

49 citing papers in PubMed, 10 syntheses or guidelines pooled it.

  1. Creatine supplementation in soccer players: a systematic review.Journal of the International Society of Sports Nutrition · 2026
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  9. Benefits of Creatine Supplementation for Vegetarians Compared to Omnivorous Athletes: A Systematic Review.International journal of environmental research and public health · 2020
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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

6 authors.

Juan Mielgo-AyusoDepartment of Biochemistry and Physiology, School of Physical Therapy, University of Valladolid, 42004 Soria, Spain. juanfrancisco.mielgo@uva.es.ORCID 0000-0002-6554-4602
Julio Calleja-GonzalezLaboratory of Human Performance, Department of Physical Education and Sport, Faculty of Education, University of the Basque Country, 01007 Vitoria, Spain. julio.calleja.gonzalez@gmail.com.
Diego Marqués-JiménezAcademy Department, Deportivo Alavés SAD, 01007 Vitoria-Gasteiz, Spain. diegomarquesjimenez@gmail.com.
Alberto Caballero-GarcíaDepartment of Anatomy and Radiology, Faculty of Physical Therapy, University of Valladolid, Campus de Soria, 42004 Soria, Spain. albcab@ah.uva.es.
Alfredo CórdovaDepartment of Biochemistry and Physiology, School of Physical Therapy, University of Valladolid, 42004 Soria, Spain. a.cordova@bio.uva.es.
Diego Fernández-LázaroDepartment of Cellular Biology, Histology and Pharmacology, Faculty of Physical Therapy, University of Valladolid, Campus de Soria, 42004 Soria, Spain. diego.fernandez.lazaro@uva.es.ORCID 0000-0002-6522-8896

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Studies have shown that creatine supplementation increases intramuscular creatine concentrations, favoring the energy system of phosphagens, which may help explain the observed improvements in high-intensity exercise performance. However, research on physical performance in soccer has shown controversial results, in part because the energy system used is not taken into account. The main aim of this investigation was to perform a systematic review and meta-analysis to determine the efficacy of creatine supplementation for increasing performance in skills related to soccer depending upon the type of metabolism used (aerobic, phosphagen, and anaerobic metabolism). A structured search was carried out following the Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) guidelines in the Medline/PubMed and Web of Science, Cochrane Library, and Scopus databases until January 2019. The search included studies with a double-blind and randomized experimental design in which creatine supplementation was compared to an identical placebo situation (dose, duration, timing, and drug appearance). There were no filters applied to the soccer players' level, gender, or age. A final meta-analysis was performed using the random effects model and pooled standardized mean differences (SMD) (Hedges's

Indexed as

Athletic PerformanceDietary SupplementsSoccerCreatineHumansMaleCreatineergogenic aidsnutritional supplementsphysical performancerecoverysport nutritionteam sports

Identifiers

PMID30935142
PMCPMC6520963

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.