Common sense has led many to believe that youth football players can't possibly sustain high-impacts like their adult counterparts. But veteran correspondent Stone Phillips' report "Hard Hits, Hard Numbers," featured researchers at Virginia Tech (VT) who recently turned that theory upside down when they analyzed impact data from the helmets of 7- and 8-year old players in Montgomery County, Virginia.
Accelerometers placed inside seven helmets wirelessly transmitted data to scientists on the sideline for a season's worth of practices and games, with surprising results. The bottom line? Maybe it's time to take another look at practices, drills, and helmet design to minimize the forces absorbed during an average season.
Regardless of the significance of the impact, none of the players sustained concussions during the season. Therein lies an enduring mystery, why small impacts cause concussions in some players while others walk away from big hits.
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The force of acceleration is often measured in g. Fighter pilots may "pull" 9g in an F-16, a sneeze may register 3g. They're part of everyday life. But because of the heightened interest in sports-related concussions, researchers are investigating a multitude of ways to reduce brain impacts for everyone from adults to youth. But first, they had to identify if there was even an issue at all.
Worth a look
The VT study was the first of its kind to measure the impacts sustained during youth football. Having worked for nine years recording over 150,000 hits with the helmet impact system at the university, researchers turned their attention to an area youth league.
The forces averaged about 15g, meaning half of the hits measured below that level, the other half above. In one case, well above. One hit measured 100g, a big hit by college standards. Most of the more forceful impacts came during practice.
Highlights from PBS NewsHour include:
- reseachers believe 98g or above is a red flag for a possible concussion
- a total 753 impacts were recorded
- average player sustained 107 impacts in one season; high school players average about 500; college players sustain about 1,000/season
- there were 38 impacts of 40g or greater; almost every one occurred during practice
- six impacts measured over 80g, the lower range VT researchers consider to be the risk of concussion
- youth football players lack strong neck and chest muscles of older players to maintain head stability
- 50, 60, 70g impacts were surprising
- location of impact is important as are individual differences and tolerances
- there is more helmet-to-helmet contact in youth football than occurs in older players; most impacts occurred on the front of helmet
- more head-to-ground impacts found at college level
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Researchehttps://luded that addressing changes in practice would likely reduce the number of impacts per season, an important factor in any youth sport. Less contact drills, fewer contact practices and other modifications would be beneficial, particularly as the effects of sub-concussive hits, impacts that may cause changes in the brain without causing symptoms, continue to be studied.
Source: Stone Phillips Reports
Pint-Size Footbal Players Take Big-League Hits -- PBS NewsHour -- April 3, 2012
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