Head impact exposure in collegiate football players

Joseph J. Crisco, Bethany J. Wilcox, Jonathan G. Beckwith, Jeffrey J. Chu, Ann Christine Duhaime, Steven Rowson, Stefan M. Duma, Arthur C. Maerlender, Thomas W. McAllister, Richard M. Greenwald

Research output: Contribution to journalArticle

141 Citations (Scopus)

Abstract

In American football, impacts to the helmet and the resulting head accelerations are the primary cause of concussion injury and potentially chronic brain injury. The purpose of this study was to quantify exposures to impacts to the head (frequency, location and magnitude) for individual collegiate football players and to investigate differences in head impact exposure by player position. A total of 314 players were enrolled at three institutions and 286,636 head impacts were recorded over three seasons. The 95th percentile peak linear and rotational acceleration and HITsp (a composite severity measure) were 62.7g, 4378rad/s 2 and 32.6, respectively. These exposure measures as well as the frequency of impacts varied significantly by player position and by helmet impact location. Running backs (RB) and quarter backs (QB) received the greatest magnitude head impacts, while defensive line (DL), offensive line (OL) and line backers (LB) received the most frequent head impacts (more than twice as many than any other position). Impacts to the top of the helmet had the lowest peak rotational acceleration (2387rad/s 2), but the greatest peak linear acceleration (72.4g), and were the least frequent of all locations (13.7%) among all positions. OL and QB had the highest (49.2%) and the lowest (23.7%) frequency, respectively, of front impacts. QB received the greatest magnitude (70.8g and 5428rad/s 2) and the most frequent (44% and 38.9%) impacts to the back of the helmet. This study quantified head impact exposure in collegiate football, providing data that is critical to advancing the understanding of the biomechanics of concussive injuries and sub-concussive head impacts.

Original languageEnglish (US)
Pages (from-to)2673-2678
Number of pages6
JournalJournal of Biomechanics
Volume44
Issue number15
DOIs
StatePublished - Oct 13 2011

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Football
Head
Head Protective Devices
Biomechanics
Brain
Chronic Brain Injury
Wounds and Injuries
Composite materials
Biomechanical Phenomena
Running

Keywords

  • Acceleration
  • Biomechanics
  • Concussion
  • Frequency
  • Helmet
  • Severity

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Biomedical Engineering
  • Rehabilitation

Cite this

Crisco, J. J., Wilcox, B. J., Beckwith, J. G., Chu, J. J., Duhaime, A. C., Rowson, S., ... Greenwald, R. M. (2011). Head impact exposure in collegiate football players. Journal of Biomechanics, 44(15), 2673-2678. https://doi.org/10.1016/j.jbiomech.2011.08.003

Head impact exposure in collegiate football players. / Crisco, Joseph J.; Wilcox, Bethany J.; Beckwith, Jonathan G.; Chu, Jeffrey J.; Duhaime, Ann Christine; Rowson, Steven; Duma, Stefan M.; Maerlender, Arthur C.; McAllister, Thomas W.; Greenwald, Richard M.

In: Journal of Biomechanics, Vol. 44, No. 15, 13.10.2011, p. 2673-2678.

Research output: Contribution to journalArticle

Crisco, JJ, Wilcox, BJ, Beckwith, JG, Chu, JJ, Duhaime, AC, Rowson, S, Duma, SM, Maerlender, AC, McAllister, TW & Greenwald, RM 2011, 'Head impact exposure in collegiate football players', Journal of Biomechanics, vol. 44, no. 15, pp. 2673-2678. https://doi.org/10.1016/j.jbiomech.2011.08.003
Crisco JJ, Wilcox BJ, Beckwith JG, Chu JJ, Duhaime AC, Rowson S et al. Head impact exposure in collegiate football players. Journal of Biomechanics. 2011 Oct 13;44(15):2673-2678. https://doi.org/10.1016/j.jbiomech.2011.08.003
Crisco, Joseph J. ; Wilcox, Bethany J. ; Beckwith, Jonathan G. ; Chu, Jeffrey J. ; Duhaime, Ann Christine ; Rowson, Steven ; Duma, Stefan M. ; Maerlender, Arthur C. ; McAllister, Thomas W. ; Greenwald, Richard M. / Head impact exposure in collegiate football players. In: Journal of Biomechanics. 2011 ; Vol. 44, No. 15. pp. 2673-2678.
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