Effectiveness of a football over helmet padding system in reducing peak acceleration of the head and severity index 2014
Date of Award
Open Access Thesis
Master of Science (MS)
Peter McGinnis, Ph.D.
The purpose of this study was to determine if: (a) a football helmet equipped with the Guardian Cap meets the National Operating Committee on Standards for Athletic Equipment (NOCSAE) football helmet standards and (b) if the Severity Indexes and peak accelerations produced during the NOCSAE impact tests were smaller for a football helmet equipped with the Guardian Cap over-helmet padding system than for the same helmet without the Guardian Cap. A total of 54 drop impact tests were completed, 27 on the football helmet alone and 27 on the football helmet equipped with the Guardian Cap. Tests were completed on seven different locations on the helmet at four different velocities and two different temperatures as per NOCSAE test standards. When the helmet was outfitted with the Guardian Cap, the highest Severity Index (SI) recorded was 751 at the rear impact location as compared to an SI of 842 at the same impact location on the helmet alone. Overall, the average SI when the Guardian Cap was attached was 324 ± 195 as compared to an overall average of 368 ± 219 for the helmet alone. The average peak acceleration (gmax) for the helmet with the Guardian Cap was 85 g’s ± 23 as compared to 91 g’s ± 26 for the helmet alone. These data for the Guardian Cap covered football helmet were below the maximum SI allowed by NOCSAE to be a certified football helmet. The SI and peak accelerations for the Guardian Cap covered football helmet were smaller than the SI and peak accelerations for the helmet alone on the NOCSAE impact tests. Medical professionals, coaches, players and parents can use this information to make informed decisions on the role of the Guardian Cap in possibly preventing or limiting the risk of concussions in football.
Cuccurullo, Nicole, "Effectiveness of a football over helmet padding system in reducing peak acceleration of the head and severity index 2014" (2014). Master's Theses. 94.
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