Evidence map›Paper›PMID 28097488›Full record

SynthesisSports medicine (Auckland, N.Z.)2017

Polyphenols and Performance: A Systematic Review and Meta-Analysis.

Vaughan Somerville, Cameron Bringans, Andrea Braakhuis

Erratum issuedAbstract readMeta-AnalysisSystematic Review
PubMed Publisher
In one paragraph

Synthesis in Sports medicine (Auckland, N.Z.), 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 54 papers, 12 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
54citing papers in PubMed, 12 pooled it
8.5field-weighted citation impact, top 2% of its field
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

54 citing papers in PubMed, 12 syntheses or guidelines pooled it, 111 citations in OpenAlex.

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  19. Acute Effects ofFoods (Basel, Switzerland) · 2026
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Vaughan SomervilleDepartment of Nutrition and Dietetics, Faculty of Medical and Health Science, The University of Auckland, Auckland, New Zealand. vsom721@aucklanduni.ac.nz.ORCID http://orcid.org/0000-0002-1980-4135
Cameron BringansDepartment of Surgery, Faculty of Medical and Health Science, School of Medicine, The University of Auckland, Auckland, New Zealand.
Andrea BraakhuisDepartment of Nutrition and Dietetics, Faculty of Medical and Health Science, The University of Auckland, Auckland, New Zealand.
University of Auckland · NZ

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPolyphenols exert physiological effects that may impact athletic performance. Polyphenols are antioxidants that have been noted to hinder training adaptations, yet conversely they stimulate stress-related cell signalling pathways that trigger mitochondrial biogenesis and influence vascular function.

objectiveTo determine the overall effect of polyphenols on human athletic performance.

methodsA search strategy was completed using MEDLINE, EMBASE, CINAHL, AMED and SPORTDiscus in April 2016. The studies were screened and independently reviewed by two researchers against predetermined criteria for eligibility. As a result of this screening, 14 studies were included for meta-analysis. Of these, the studied populations were predominately-trained males with an average intervention dose of 688 ± 478 mg·day

resultsThe pooled results demonstrate polyphenol supplementation for at least 7 days increases performance by 1.90% (95% CI 0.40-3.39). Sub-analysis of seven studies using quercetin identified a performance increase of 2.82% (95% CI 2.05-3.58). There were no adverse effects reported in the studies in relation to the intervention.

conclusionOverall the pooled results show that polyphenols, and of note quercetin, are viable supplements to improve performance in healthy individuals.

Indexed as

Dietary SupplementsAntioxidantsAthletic PerformanceHumansMaleOxidative StressPolyphenolsQuercetinAntioxidantsPolyphenolsQuercetin

Identifiers

PMID28097488
OpenAlexW2577511100

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.