Observational studyJournal of athletic training2017
The Ability of an Aftermarket Helmet Add-On Device to Reduce Impact-Force Accelerations During Drop Tests.
Observational study in Journal of athletic training, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
What it found
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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.
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.
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Who cites it
10 citing papers in PubMed.
- How Shell Add-On Products Influence Varsity Football Helmet Performance?Annals of biomedical engineering · 2024Article
- Preliminary Examination of Guardian Cap Head Impact Kinematics Using Instrumented Mouthguards.Journal of athletic training · 2024Article
- Efficacy of Guardian Cap Soft-Shell Padding on Head Impact Kinematics in American Football: Pilot Findings.International journal of environmental research and public health · 2023Article
- Design Considerations for the Attenuation of Translational and Rotational Accelerations in American Football Helmets.Journal of biomechanical engineering · 2023Article
- Preliminary Examination of Guardian Cap Head Impact Data Using Instrumented Mouthguards.ArXiv · 2023Article
- National Athletic Trainers' Association Position Statement: Reducing Intentional Head-First Contact Behavior in American Football Players.Journal of athletic training · 2022Article
- The Effects of On-Field Heat Index and Altitude on Concussion Assessments and Recovery Among NCAA Athletes.Sports medicine (Auckland, N.Z.) · 2021Article
- A football helmet prototype that reduces linear and rotational acceleration with the addition of an outer shell.Journal of neurosurgery · 2019Article
- Sport-Related Concussion: Evaluation, Treatment, and Future Directions.Medical sciences (Basel, Switzerland) · 2019Review
- Fewer US Adolescents Playing Football and Public Health: A Review of Measures to Improve Safety and an Analysis of Gaps in the Literature.Public health reports (Washington, D.C. : 1974)Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
contextThe Guardian Cap provides a soft covering intended to mitigate energy transfer to the head during football contact. Yet how well it attenuates impacts remains unknown.
objectiveTo evaluate the changes in the Gadd Severity Index (GSI) and linear acceleration during drop tests on helmeted headforms with or without Guardian Caps.
designCrossover study.
settingLaboratory. PATIENTS OR OTHER
participantsNine new football helmets sent directly from the manufacturer. INTERVENTION(S): We dropped the helmets at 3 velocities on 6 helmet locations (front, side, right front boss, top, rear right boss, and rear) as prescribed by the National Operating Committee on Standards for Athletic Equipment. Helmets were tested with facemasks in place but no Guardian Cap and then retested with the facemasks in place and the Guardian Cap affixed. MAIN OUTCOME MEASURE(S): The GSI scores and linear accelerations measured in g forces.
resultsFor the GSI, we found a significant interaction among drop location, Guardian Cap presence, and helmet brand at the high velocity (F
conclusionsThe Guardian Cap failed to significantly improve the helmets' ability to mitigate impact forces at most locations. Limited evidence indicates how a reduction in GSI would provide clinically relevant benefits beyond reducing the risk of skull fracture or a similar catastrophic event.
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Registered trials
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