Evidence map›Paper›PMID 34901294›Full record

ArticleOrthopaedic journal of sports medicine2021

Characterizing Head Impact Exposure in Men and Women During Boxing and Mixed Martial Arts.

A Elizabeth Jansen, Morgan McGrath, Sergey Samorezov, Joshua Johnston, Adam Bartsch, Jay Alberts

Open access · goldAbstract read
In one paragraph

Article in Orthopaedic journal of sports medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
3.3field-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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 32 citations in OpenAlex.

  1. Pooled it
  2. Bioenergetics of the combat sports brain: Between risk and resilience.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2026
    Review
  3. Article
  4. Observational
  5. Article
  6. Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Head Trauma Exposure in Mixed Martial Arts.International journal of environmental research and public health · 2022
    Article
  18. Review
  19. Football and Dementia: Understanding the Link.Frontiers in psychiatry · 2022
    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

6 authors at 1 institution in 1 country.

A Elizabeth JansenDepartment of Biomedical Engineering, Cleveland Clinic, Cleveland, Ohio, USA.
Morgan McGrathDepartment of Biomedical Engineering, Cleveland Clinic, Cleveland, Ohio, USA.
Sergey SamorezovDepartment of Biomedical Engineering, Cleveland Clinic, Cleveland, Ohio, USA.
Joshua JohnstonDepartment of Biomedical Engineering, Cleveland Clinic, Cleveland, Ohio, USA.
Adam BartschPrevent Biometrics, Edina, Minnesota, USA.
Jay AlbertsDepartment of Biomedical Engineering, Cleveland Clinic, Cleveland, Ohio, USA.
Cleveland Clinic · US

Funding

MEDICAL SCIENTIST TRAINING PROGRAMT32GM007250 · NIGMS · CASE WESTERN RESERVE UNIVERSITY · PI HUANG, ALEX YEE-CHEN · 1985 to 2023
$33.4M
INTELLIGENT MOUTHGUARD FOR MEASURING HEAD IMPACTS IN YOUTH ATHLETESR41HD079158 · NICHD · SPORTSGUARD LABORATORIES, INC. · PI BARTSCH, ADAM JESSE · 2015 to 2015
$225k
Mouthpiece for mTBI Detection during Adolescent Contact and Collision SportsR43NS076102 · NINDS · ADVANCED MEDICAL ELECTRONICS CORPORATION · PI GIBSON, PAUL L · 2012 to 2012
$179k
NICHD NIH HHS R41 HD079158NIGMS NIH HHS T32 GM007250NINDS NIH HHS R43 NS076102
6 · The paper itself

Abstract

backgroundThe accumulation of subconcussive impacts has been implicated in permanent neurological impairment. A gap in understanding the relationship between head impacts and neurological function is the lack of precise characterization and quantification of forces that individuals experience during sports training and competition. PURPOSE: To characterize impact exposure during training and competition among male and female athletes participating in boxing and mixed martial arts (MMA) via an instrumented custom-fit Impact Monitoring Mouthguard (IMM). STUDY

designCross-sectional study; Level of evidence, 3.

methodsTwenty-three athletes (n = 4 women) were provided a custom-fit IMM. The IMM monitored impacts during sparring and competition. All training and competition sessions were videotaped. Video and IMM data were synchronized for post hoc data verification of true positives and substantiation of impact location. IMM data were collected from boxing and MMA athletes at a collaborating site. For each true-positive impact, peak linear acceleration and peak angular acceleration were calculated. Wilcoxon rank sum tests were used to evaluate potential differences in sport, activity type, and sex with respect to each outcome. Differences in impact location were assessed via Kruskal-Wallis tests.

resultsIMM data were collected from 53 amateur training sessions and 6 competitions (session range, 5-20 minutes). A total of 896 head impacts (men, n = 786; women, n = 110) were identified using IMM data and video verification: 827 in practice and 69 during competition. MMA and boxers experienced a comparable number of impacts per practice session or competition. In general, MMA impacts produced significantly higher peak angular acceleration than did boxing impacts (

conclusionCharacteristic profiles of head impact exposure differed between boxing and MMA athletes; however, the impact magnitudes were not significantly different for male and female athletes.

Indexed as

boxinghead impacthead impact powermixed martial artspeak angular accelerationpeak linear acceleration

Identifiers

PMID34901294
PMCPMC8664317
OpenAlexW4200116861

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.