Evidence map›Paper›PMID 23267392›Full record

ArticleJournal of research in medical sciences : the official journal of Isfahan University of Medical Sciences2012

Does quercetin and vitamin C improve exercise performance, muscle damage, and body composition in male athletes?

Gholamreza Askari, Reza Ghiasvand, Jahangir Karimian, Awat Feizi, Zamzam Paknahad, Gholamreza Sharifirad, Maryam Hajishafiei

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In one paragraph

Article in Journal of research in medical sciences : the official journal of Isfahan University of Medical Sciences, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 2 pooled it
4.3field-weighted citation impact, top 7% 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

21 citing papers in PubMed, 2 syntheses or guidelines pooled it, 29 citations in OpenAlex.

  1. Pooled it
  2. Antioxidants for preventing and reducing muscle soreness after exercise.The Cochrane database of systematic reviews · 2017
    Pooled it
  3. Trial
  4. Article
  5. Review
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  8. Review
  9. Review
  10. Article
  11. Review
  12. Article
  13. Exercise-induced oxidative stress and dietary antioxidants.Asian journal of sports medicine · 2015
    Review
  14. Article
  15. Article
  16. Article
  17. Dietary behaviors and nutritional assessment of young male isfahani wrestlers.International journal of preventive medicine · 2013
    Article
  18. The use of nutritional supplements among male collegiate athletes.International journal of preventive medicine · 2013
    Article
  19. Article
  20. Article
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

7 authors at 1 institution in 1 country.

Gholamreza AskariFood Security Research Center, Isfahan, Iran.
Reza Ghiasvand
Jahangir Karimian
Awat Feizi
Zamzam Paknahad
Gholamreza Sharifirad
Maryam Hajishafiei
Isfahan Fertility and Infertility Center · IR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundQuercetin is a bioflavonoid occurs in many food items. Some previous studies on quercetin showed the inconsistent results on exercise performance and muscle damage in athletes. The aim of this study was to determine the effects of 8 weeks of quercetin supplementation on exercise performance and muscle damage indices in student athletes.

methodsThis placebo-controlled, double-blind clinical trial was conducted on 60 male students for 8 weeks. The subjects were randomly assigned to one of the four groups: a) quercetin (500 mg/day quercetin + 200 mg/day placebo), b) quercetin+ vitamin C (500 mg/day quercetin + 200 mg/day vitamin C), vitamin C (500 mg/day placebo + 200 mg/day vitamin C), and placebo (500 mg/day placebo + 200 mg/day placebo). Time to exhaustion (TTE) for measuring performance, aspartate transaminase (AST), and creatine kinase (CK) for measuring muscle damage and body fat percent (BFP) were measured before and after intervention.

resultsCK levels reduced in group 1 significantly (P=0.045) and BFP reduced in group 1, 3, and 4, significantly, too (P=0.018, P=0.013, and P=0.043, respectively). Whereas statistically significant changes between groups were not observed for TTE, AST, CK, and BFP after 8 weeks of intervention.

conclusionsSupplementation with quercetin and vitamin C for 8 weeks did not improve exercise performance but reduced muscle damage and body fat percent in healthy subjects.

Indexed as

body compositionmuscle damageperformanceQuercetinvitamin C

Identifiers

PMID23267392
PMCPMC3526124
OpenAlexW1953379166

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-SA
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.