Nav: Home

Study provides the first data on concussion risk in youth football

January 21, 2020

For decades, there's been a widespread assumption among people with an interest in sports-related injury that youth football players are more vulnerable to concussion and other head injuries than their older, bigger counterparts.

The Virginia Tech Helmet Lab has published the first data validating that conventional wisdom, in a study released in the January issue of the Annals of Biomedical Engineering.

The research, funded by a five-year grant from the National Institute of Neurological Disorders and Stroke of the National Institutes of Health, demonstrated that the head accelerations leading to concussion in youth football players are lower than those that typically cause injury in high school, collegiate, and professional athletes -- data that will be critical for designing and testing protective equipment.

"These are the first biomechanical data characterizing concussion risk in kids," said Steve Rowson, an associate professor of biomedical engineering and mechanics and the director of the Virginia Tech Helmet Lab. "Children aren't just scaled-down adults: Differences in anatomy and physiology, like head-neck proportions and brain development, contribute to differences in tolerance to head impact. These results can lead to data-driven interventions to reduce risk in youth sports."

Kids between the ages of 9 and 14 make up the largest group of football players in the country. But the research cataloging head impacts on U.S. football fields, and determining which ones are most likely to cause injury, has focused on high school, collegiate, and pro players, limiting the understanding of what conditions lead to concussion in youth football.

In younger players, the fatty myelin sheaths that help protect brain cells haven't fully developed. They also tend to have larger heads relative to their bodies than adult players do, with less neck musculature to help absorb the force of an impact. For all these reasons, researchers had presumed that youth players were more susceptible to concussion. But they needed data to prove it.

Virginia Tech has been studying head impacts in football since 2003, when Stefan Duma, the Harry Wyatt Professor of Engineering and founder of the Helmet Lab, instrumented the helmets worn by the university's varsity football team with sensors to measure head impacts.

Since then, Duma, Rowson, and their research team have expanded their studies to more sports and a broader range of demographic groups. They've been studying youth players since they won this critical grant from the NIH in 2015.

For the study, they partnered with researchers at Brown University and Wake Forest University to track six different youth football teams in Virginia, North Carolina, and Rhode Island. More than 100 players wore helmets lined with sensors that measured the linear and rotational acceleration of their heads during four seasons' worth of practices and games, recording thousands of impacts. All concussions were diagnosed by clinicians at each site; neuropsychological testing before and after each season measured the players' cognitive function.

The National Operating Committee on Standards for Athletic Equipment, an independent standards body that certifies equipment including football helmets, provided additional funding that helped accelerate the data collection.

That data allowed the researchers to develop a mathematical relationship between the magnitude of a head impact and the risk of concussion. What they found was that youth players are on average more susceptible to concussion at lower levels of acceleration than high school and collegiate players are.

In high school and college players, the average concussive impact is associated with a head acceleration around 102 g, with similar values for pro athletes. In youth players, the new study found, the average concussive impact was associated with a head acceleration of only 62 g. The rotational acceleration values associated with concussion were similarly reduced, from 4,412 rad/s2 in adults to 2,609 rad/s2 in youth players.

"These numbers prove for the first time that youth players are at a higher risk of injury at lower head accelerations," Duma said, "but it is important to note that the overall head acceleration exposure in youth football is much lower than in adult football."

Despite that heightened susceptibility, concussions in youth football are relatively rare: Younger, lighter players collide with less force than adult athletes, so they're less likely to jostle their brains enough to cause serious injury.

But as with any sport, there's still a risk of injury. So effective protective equipment is critical -- and that's the practical value of this study, Duma explained. Knowing the levels of acceleration that put youth players at risk for concussion provides a benchmark to use for helmet testing.

Earlier this year, the Helmet Lab released the industry's first youth-specific football helmet ratings, evaluating the helmets with laboratory tests based on their on-field data.

"No one had ever come up with a rating system tailored to youth helmets, partly because the data didn't exist," said Duma, who also directs the university's Institute for Critical Technology and Applied Science. "Now we can evaluate helmets based on the actual risks youth players experience, and companies can use that information to design models specifically for this large group of players."
-end-
The study also involved researchers from the Edward Via College of Osteopathic Medicine, the University of Nebraska - Lincoln, and medical device company Simbex, which manufactures the sensors mounted in the players' helmets. At Virginia Tech, the study spanned the Department of Biomedical Engineering and Mechanics in the College of Engineering and the Department of Statistics in the College of Science.

Virginia Tech

Related Concussion Articles:

Study provides the first data on concussion risk in youth football
'These are the first biomechanical data characterizing concussion risk in kids,' said Steve Rowson, an associate professor of biomedical engineering and mechanics and the director of the Virginia Tech Helmet Lab.
Concussion alters how information is transmitted within the brain
Damage from concussion alters the way information is transmitted between the 2 halves of the brain, according to a new study.
Concussion recovery not clear cut for children
Sleep problems, fatigue and attention difficulties in the weeks after a child's concussion injury could be a sign of reduced brain function and decreased grey matter.
A concussion can cost your job -- especially if you are young and well educated
A seemingly harmless concussion can cause the loss of a job -- especially for patients who are in their thirties and for those with a higher education.
After concussion, biomarkers in the blood may help predict recovery time
A study of high school and college football players suggests that biomarkers in the blood may have potential use in identifying which players are more likely to need a longer recovery time after concussion, according to a study published in the July 3, 2019, online issue of Neurology, the medical journal of the American Academy of Neurology.
Concussion is a leading cause of injury for children in recreational sports
In a two-year study of children between ages 5-11 who play recreational sports, more suffered concussions than most any other sports-related injury.
Concussion symptoms reversed by magnetic therapy
Concussion symptoms -- such as loss of balance and ability to walk straight -- can be reversed by a new type of magnetic stimulation
Study paves way for better treatment of lingering concussion symptoms
The results of the study, released in Neuroscience journal, show that significant levels of fatigue and poorer brain function can persist for months, or even years, following concussion.
What makes athletes report or hide concussion symptoms?
Whether or not an NCAA Division I athlete is likely to report concussion symptoms depends on factors including their vested interests, their understanding of health implications, and their team culture and societal influences drawn from narratives of performance circulating in media, according to a study published May 8, 2019 in the open-access journal PLOS ONE by Steven Corman of Arizona State University, USA, and colleagues.
Kids' concussion recovery like snakes and ladders game
During the first 24 hours, home and leisure activities may be undertaken as long as they are only for five minutes at a time, and stopped if symptoms increase.
More Concussion News and Concussion Current Events

Trending Science News

Current Coronavirus (COVID-19) News

Top Science Podcasts

We have hand picked the top science podcasts of 2020.
Now Playing: TED Radio Hour

Climate Mindset
In the past few months, human beings have come together to fight a global threat. This hour, TED speakers explore how our response can be the catalyst to fight another global crisis: climate change. Guests include political strategist Tom Rivett-Carnac, diplomat Christiana Figueres, climate justice activist Xiye Bastida, and writer, illustrator, and artist Oliver Jeffers.
Now Playing: Science for the People

#562 Superbug to Bedside
By now we're all good and scared about antibiotic resistance, one of the many things coming to get us all. But there's good news, sort of. News antibiotics are coming out! How do they get tested? What does that kind of a trial look like and how does it happen? Host Bethany Brookeshire talks with Matt McCarthy, author of "Superbugs: The Race to Stop an Epidemic", about the ins and outs of testing a new antibiotic in the hospital.
Now Playing: Radiolab

Speedy Beet
There are few musical moments more well-worn than the first four notes of Beethoven's Fifth Symphony. But in this short, we find out that Beethoven might have made a last-ditch effort to keep his music from ever feeling familiar, to keep pushing his listeners to a kind of psychological limit. Big thanks to our Brooklyn Philharmonic musicians: Deborah Buck and Suzy Perelman on violin, Arash Amini on cello, and Ah Ling Neu on viola. And check out The First Four Notes, Matthew Guerrieri's book on Beethoven's Fifth. Support Radiolab today at Radiolab.org/donate.