Evidence map›Paper›PMID 40724071›Full record

ArticleInternational journal of environmental research and public health2025

Long-Term Cognitive Decline in MMA Fighters: A Two-Year Cohort Study on Executive Function Impairments Due to Repetitive Head Strikes.

Michele Andrade de Brito, José Raimundo Fernandes, Keveenrick Ferreira Costa, Clóvis Albuquerque Maurício, Aleksandro Ferreira Gonçalves, Otávio de Toledo Nóbrega, Esteban Aedo-Muñhoz, Ciro José Brito, Diego Ignácio Vanezuela Pérez, Bianca Miarka

Abstract read
In one paragraph

Article in International journal of environmental research and public health, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–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

2 citing papers in PubMed.

  1. Review
  2. Review
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

10 authors.

Michele Andrade de BritoGraduate Program in Physical Education, Federal University of Rio de Janeiro, Rio de Janeiro 21941-617, Brazil.
José Raimundo FernandesUniversidade do Vale do Rio Doce, Governador Valadares 35020-220, Brazil.
Keveenrick Ferreira CostaUniversidade do Vale do Rio Doce, Governador Valadares 35020-220, Brazil.
Clóvis Albuquerque MaurícioGraduate Program in Physical Education, Federal University of Rio de Janeiro, Rio de Janeiro 21941-617, Brazil.
Aleksandro Ferreira GonçalvesGraduate Program in Physical Education, Federal University of Rio de Janeiro, Rio de Janeiro 21941-617, Brazil.ORCID 0000-0002-1124-6773
Otávio de Toledo NóbregaSchool of Physical Education, University of Brasilia, Brasilia 70910-900, Brazil.
Esteban Aedo-MuñhozDepartamento de Educación Física, Deportes y Recreación, Universidad Metropolitana de Ciencias de la Educación, Ñuñoa 7760197, Chile.ORCID 0000-0003-1544-2824
Ciro José BritoGraduate Program in Physical Education, Federal University of Juiz de Fora, Juiz de Fora 36036-900, Brazil.ORCID 0000-0002-9678-1977
Diego Ignácio Vanezuela PérezEscuela de Kinesiologia, Universidad Santo Tomás, Santiago, Ñuñoa 7800262, Chile.
Bianca MiarkaGraduate Program in Physical Education, Federal University of Rio de Janeiro, Rio de Janeiro 21941-617, Brazil.ORCID 0000-0002-7513-7605

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThis study examines the long-term cognitive consequences of repetitive head impact on executive functions in mixed martial arts (MMA) fighters over two years.

methodsNeuropsychological tests assessed executive functions in two groups: competitive (CG;

resultsA significant interaction between time and group was observed. The CG experienced greater declines in Mental Processing Speed (MPS) after 1 year [4.6 s (3.1; 6.1);

conclusionsThese findings highlight the detrimental effects of MMA competitions on cognitive function, emphasizing the need for monitoring and interventions to preserve fighters' health and performance.

Indexed as

Cognitive DysfunctionExecutive FunctionMartial ArtsAdultCohort StudiesFemaleHumansMaleMiddle AgedNeuropsychological TestsYoung Adultathletic injuriesbrain injuriesexecutive functionhead traumamemory disordersmixed martial artsneuropsychological tests

Identifiers

PMID40724071
PMCPMC12294694

What OpenQuestion holds

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Registered trials

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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.