• P Gunnar Brolinson, Sarah Manoogian, David McNeely, Mike Goforth, Richard Greenwald, and Stefan Duma.
• Division of Sports Medicine, Edward Via Virginia College of Osteopathic Medicine, Virginia Tech Department of Athletics, Blacksburg, VA 24061, USA. techdo@vt.edu
• Curr Sports Med Rep. 2006 Feb 1;5(1):23-8.

AbstractSports-related concussions result in 300,000 brain injuries in the United States each year. We conducted a study utilizing an in-helmet system that measures and records linear head accelerations to analyze head impacts in collegiate football. The Head Impact Telemetry (HIT) System is an in-helmet system with six spring-mounted accelerometers and an antenna that transmits data via radio frequency to a sideline receiver and laptop computer system. A total of 11,604 head impacts were recorded from the Virginia Tech football team throughout the 2003 and 2004 football seasons during 22 games and 62 practices from a total of 52 players. Although the incidence of injury data are limited, this study presents an extremely large data set from human head impacts that provides valuable insight into the lower limits of head acceleration that cause mild traumatic brain injuries.

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