Evidence map›Paper›PMID 35889953›Full record

SynthesisNutrients2022

Acute Effects of Caffeine Supplementation on Physical Performance, Physiological Responses, Perceived Exertion, and Technical-Tactical Skills in Combat Sports: A Systematic Review and Meta-Analysis.

Slaheddine Delleli, Ibrahim Ouergui, Hamdi Messaoudi, Khaled Trabelsi, Achraf Ammar, Jordan M Glenn, Hamdi Chtourou

Open access · goldAbstract readMeta-AnalysisSystematic Review
PubMed Full text at PMC Publisher
In one paragraph

Synthesis in Nutrients, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 6 pooled it
7.5field-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

26 citing papers in PubMed, 6 syntheses or guidelines pooled it, 44 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Pooled it
  6. Pooled it
  7. Acute effects of 3 and 6 mg·KgJournal of the International Society of Sports Nutrition · 2026
    Trial
  8. Caffeine's influence on vertical jump height: a real-life collegiate student-athlete approach.Journal of the International Society of Sports Nutrition · 2025
    Trial
  9. Trial
  10. Trial
  11. Effect ofNutrients · 2024
    Trial
  12. Trial
  13. Trial
  14. Trial
  15. Review
  16. Article
  17. Review
  18. Review
  19. Article
  20. Assessment Methods of Sport-Induced Neuromuscular Fatigue: A Scoping Review.International journal of sports physical therapy · 2025
    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 3 institutions in 4 countries.

Slaheddine DelleliResearch Unit, Physical Activity, Sport and Health, UR18JS01, National Observatory of Sport, Tunis 1003, Tunisia.ORCID 0000-0003-0013-8774
Ibrahim OuerguiHigh Institute of Sport and Physical Education of Kef, University of Jendouba, Kef 7100, Tunisia.ORCID 0000-0002-0131-1594
Hamdi MessaoudiResearch Unit, Physical Activity, Sport and Health, UR18JS01, National Observatory of Sport, Tunis 1003, Tunisia.
Khaled TrabelsiHigh Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax 3000, Tunisia.ORCID 0000-0003-2623-9557
Achraf AmmarDepartment of Training and Movement Science, Institute of Sport Science, Johannes Gutenberg-University Mainz, 55131 Mainz, Germany.ORCID 0000-0003-0347-8053
Jordan M GlennDepartment of Health, Exercise Science Research Center Human Performance and Recreation, University of Arkansas, Fayetteville, AR 72701, USA.ORCID 0000-0002-2563-4291
Hamdi ChtourouResearch Unit, Physical Activity, Sport and Health, UR18JS01, National Observatory of Sport, Tunis 1003, Tunisia.ORCID 0000-0002-5482-9151
University of Sfax · TNNeurotrack Technologies (United States) · USUniversity of Jendouba · TN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Although the effects of caffeine supplementation on combat sports performance have been extensively investigated, there is currently no consensus regarding its ergogenic benefits.This systematic review with meta-analysis aimed to summarize the studies investigating the effects of caffeine supplementation on different aspects of performance in combat sports and to quantitatively analyze the results of these studies to better understand the ergogenic effect of caffeine on combat sports outcomes. A systematic search for randomized placebo-controlled studies investigating the effects of caffeine supplementation on combat sports' performance was performed through Scopus, Pubmed, Web of Science and Cochrane Library databases up to 18 April 2022. Random-effects meta-analyses of standardized mean differences (Hedge's g) were performed to analyze the data. Twenty-six studies of good and excellent methodological quality (based on the Pedro scale) fulfilled the inclusion criteria. The meta-analysis results revealed caffeine has a small but evident effect size (ES) on handgrip strength (ES = 0.28; 95% CI: 0.04 to 0.52;

Indexed as

Athletic PerformancePerformance-Enhancing SubstancesCaffeineDietary SupplementsHand StrengthPhysical ExertionPhysical Functional PerformanceCaffeinePerformance-Enhancing Substancescaffeineergogenic aidmartial artssupplementation

Identifiers

PMID35889953
PMCPMC9315598
OpenAlexW4286433627

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.