As they root for the home team from the bleachers this fall, high school gridiron fans in the small Illinois town of Tolono don't necessarily see anything out of the ordinary down on the field.
But just out of sight, tucked inside many of the maroon helmets worn by the Unity High School Rockets, a revolution of sorts is taking place. This season, 32 varsity team members are sporting helmets outfitted with the same electronic encoder modules now used by a handful of college teams.
The purpose of the high-tech headgear, which uses six strategically placed, spring-loaded accelerometers to wirelessly beam information to a Web-based system on a laptop computer on the sidelines, is to more effectively – and more immediately – detect when blows to players' heads may result in concussions or more severe brain injuries.
In addition, impact data – including location of hits, magnitude of force and length of hits – is recorded for analysis by a University of Illinois research team led by kinesiology and community health professor Steven Broglio.
“Unity is the only high school in the country using the Head Impact Telemetry System, or HITS,” Broglio said. “There are 12 million high school football players across the nation,” he said. “This is a huge population we don't know much about.”
The system being used in the research partnership between the U. of I. and Unity was developed by Simbex, a research and product-development company based in New Hampshire. It works in tandem with helmets made by Riddell, the nation's largest helmet manufacturer, and was first tested on the Virginia Tech football team in 2002.
Broglio said a number of other researchers at universities across the nation, including Virginia Tech, the University of North Carolina and Dartmouth, also are using the system as the basis for studies of biomechanical processes caused by concussions and traumatic brain injuries.
At Unity, each varsity player was given a baseline assessment for neurocognitive function prior to the start of the season.
“The baseline assessments are all over the map,” Broglio said. “Because the kids' brains are still developing, they have different ranges and abilities.”
On the field during practice or on game day, when the encoder in an athlete's helmet registers a hit, the system beams impact information to the sidelines laptop, which is monitored by the team's athletic trainer.
“If an athlete is diagnosed with a concussion, he will not return to play until neurocognitive function returns to baseline performance,” Broglio said.
The fact that high school athletes' brains may not yet be as fully developed as their college or professional counterparts is a large part of Broglio's motivation for studying the system's effectiveness on the younger players.
The U. of I. researcher noted in many high schools across the country it's not unusual for players to take a forceful hit, sit out briefly, then return to play. And sometimes they'll even mask symptoms from coaches and trainers because they don't want to miss the action.
Unfortunately, Broglio said, “what other researchers are finding is that people with multiple concussions have incurred Alzheimer's Disease at a higher rate. Getting their ‘bell rung' as high school athletes may have permanent repercussions. There seems to be a link.”
He noted that there's also some evidence in the literature that among high school athletes, the force of an impact may actually be less than it is with older players.