Each Year You Play Football Increases Your Chances of Developing CTE by 30 Percent
By Ken Reed
According to a study from researchers at the Boston University CTE Center, each year a person endures the repetitive head collisions from playing football the risk of developing the degenerative brain disease chronic traumatic encephalopathy (CTE) increases by 30 percent. In addition, for every 2.6 years of play, the risk of developing CTE doubles.
This study quantifies the strength of the link between playing football and developing CTE, according to the Boston University School of Medicine.
According to a BU School of Medicine article:
“In a critical distinction between many previous CTE studies, the analysis included dozens of brains of former football players who did not have CTE. That sizable control group provided enough data for the researchers to be confident in their discovery that there is a strong relationship between CTE risk and the number of years a person plays football.”
“While we don’t yet know the absolute risk of developing CTE among American football players, we now can quantify that each year of play increases the odds of developing CTE by 30 percent,” said Jesse Mez, lead author of the study and director of BU’s Alzheimer’s Disease Center’s Clinical Core.
The study also found that athletes who played football fewer than 4.5 years were 10 times less likely to develop CTE than those who played longer. Conversely, players who competed more than 14.5 years were 10 times more likely to develop CTE than those who played fewer.
The BU study is but one of a growing mound of research studies linking tackle football and CTE.
“[CTE is] much more common than we currently realize,” says Ann McKee, chief of neuropathology at VA Boston Healthcare System and director of the BU CTE Center. “And more importantly, this is a problem in football that we need to address, and we need to address it now ….”
Here’s football’s foundational problem: You can’t put a helmet on the brain inside of the skull. Modern football helmets are great for preventing skull fractures, but they don’t address the problem of a brain floating around inside the head and crashing against the side of the skull upon impact.
My biggest concern isn’t the adults playing football in the NFL, it’s the thousands of youth and high school players who are playing this dangerous game before they reach the age of consent. Legal adults in the NFL (and those in college) are free to make whatever decision they want regarding the activities they participate in. That said, I would argue that we still have a moral obligation to fully inform college and pro football players of the dangers and risks of their game.
But when it comes to children playing football, it’s a different story altogether. These young athletes are being placed on the gridiron by parents or legal guardians. Children aren’t fully equipped to analyze the potential health implications of playing football. The adults in their lives are making these decisions for them. And those decisions could impact them for the rest of their lives.
According to the Brain Injury Research Institute, in any given season, 20 percent of high school players sustain brain injuries.
It’s important to note that this issue isn’t just about concussions. The common view is that concussions are the big problem with football. That’s not the case. It’s the small, but repetitive, sub-concussive impacts that add up to a big problem over time.
Wake Forest researchers followed 25 boys ages 8 through 13 over a season of tackle football. They placed sensors inside the players’ helmets to measure impacts. Players accumulated between 250 to 580 “crashes” during the season. The MRIs of the kids’ brains taken before and after the season showed that those “who experienced more cumulative head impact exposure had more changes in brain white matter.” The stunning part is not one player had suffered a concussion. Brain damage had occurred without any concussions in the group. And the players and the parents weren’t even aware of it. That’s scary. Purdue University has conducted a similar study with similar results.
The reality is now excruciatingly clear: full-contact tackle football is a collision sport that damages the human brain in much the same way boxing does.
“There’s something to the play of football that damages the brain,” says McKee, one of the world’s preeminent experts on CTE. “That, to me, is irrefutable.”
How much longer are we, as a society, going to practice avoidance behavior when it comes to the dangers football represents to the human brain – especially the developing brains of our children?
— Ken Reed, Sports Policy Director, League of Fans

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Episode #27 – League of Fans’ Sports Forum podcast: Kids’ Sports: How We Can Take Back the Game and Restore Quality Family Time In the Process – Linda Flanagan is author of “Take Back the Game: How Money and Mania Are Ruining Kids’ Sports and Why It Matters.” We discuss how commercialized and professionalized youth sports are hurting kids and their families.
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Media
"How We Can Save Sports" author Ken Reed appears on Fox & Friends to explain how there's "too much adult in youth sports."
Ken Reed appears on Mornings with Gail from KFKA Radio in Colorado to discuss bad parenting in youth athletics.
“Should College Athletes Be Paid?” Ken Reed on The Morning Show from Wisconsin Public Radio
Ken Reed appears on KGNU Community Radio in Colorado (at 02:30) to discuss equality in sports and Title IX.
Ken Reed appears on the Ralph Nader Radio Hour (at 38:35) to discuss his book The Sports Reformers: Working to Make the World of Sports a Better Place, and to talk about some current sports issues.
- Reed Appears on Ralph Nader Radio Hour League of Fans’ sports policy director, Ken Reed, Ralph Nader and the New York Times’ Tyler Kepner discussed a variety of sports issues on Nader’s radio show as well as Reed’s updated book, How We Can Save Sports: A Game Plan. Reed's book was released in paperback in February, and has a new introduction and several updated sections.
League of Fans is a sports reform project founded by Ralph Nader to fight for the higher principles of justice, fair play, equal opportunity and civil rights in sports; and to encourage safety and civic responsibility in sports industry and culture.
Vanderbilt Sport & Society - On The Ball with Andrew Maraniss with guest Ken Reed, Sports Policy Director for League of Fans and author of How We Can Save Sports: A Game Plan
Sports & Torts – Ken Reed, Sports Policy Director, League of Fans – at the American Museum of Tort Law
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