Flawed study claims brain trauma in 30% of MMA fights


A new Canadian study published in American Journal of Sports Medicine, concluded that mixed martial arts fighter suffers a traumatic brain injury in nearly 30% of professional fights. The rate was higher than that for football, hockey, or even boxing.

Researchers at the University of Toronto studied all UFC fight results from 2006 to 2012, and reviewed video of the bouts.

Among the findings of the study were:
•Average time between the KO-strike and match stoppage was 3.5 seconds, with losers sustaining an average of 2.6 additional strikes to the head.
•For TKOs secondary to strikes, in the 30-second interval immediately preceding match stoppage, losers sustained, on average, 18.5 strikes, with 92.3% of these being strikes to the head.
Rates of KOs and TKOs in MMA are higher than previously reported rates in other combative and contact sports. 

They concluded the damage done to MMA fighters is likely exacerbated by the “surprising,” repeated blows to the head delivered after they have already been put out cold.

The researchers suggest banning the growing sport among young people, and instituting rules at the pro level that limit action after a competitor is downed, much like the 10-second count in boxing.

Concussions have become a hot topic in hockey and football, as evidence mounts of their potentially debilitating long-term impact, but received relatively little attention in MMA.

“This draws attention to the fact that relevant questions need to be asked of a sport for which the objective at some level is to knock them out,” said Michael Hutchison, a U of T kinesiology professor and lead author.

“The [knocked out] person is rendered unable to defend themselves, and then they’re getting multiple strikes to their head. That’s probably not good for one’s health.”

The UFC - the sport’s dominant promotional company - is still reviewing the “technical medical document” and is not ready to comment on it yet, said Steve Keogh.

Despite its popularity, the sport has long faced criticism, with several medical associations calling for its banning, and some provinces and states doing so.

There is little empirical data, though, on its relative safety.

The study conduCTEd by Prof. Hutchison and doctors at St. Michael’s Hospital in Toronto did not involve actual medical diagnosis of MMA fighters.

Instead, they analyzed the publicly available scorecards from professional UFC matches, which indicate whether a fight ended in a knockout or TKO. While not definitive evidence, it is probable that a knockout, where the fighter loses consciousness, involves a concussion or more severe brain injury, said Prof. Hutchison.

The researchers also analyzed video to find technical knockouts that involved multiple strikes to the head, which they also suggest likely represent a traumatic brain injury.

They detected an average of 6.4 knockouts per athlete for every 100 fights, or “athlete exposures.” When the multiple-strike TKOs were added, the total of suspected brain injuries climbed to 15.9 per athlete per 100 bouts, or one concussion-like injury in 32% of matches.

That compares to rates, found in other studies, of 4.9 concussions per 100 athlete exposures in boxing, 2.2 per 100 in hockey and 8.08 per 100 in football, the paper said.

Analysis of the fight video suggested that 90% of the TKOs were a result of repetitive strikes. “The 30 seconds before match stoppage was characterized by the losing competitor sustaining a flurry of multiple strikes to the head,” said the study.

Half of the knockouts occurred because of blows to the mandible, or lower jaw.

And the researchers found an average of 2.6 head strikes after a knockout, inflicted on unconscious fighters.

Evidence that such injuries can result in structural damage to the brain and “chronic traumatic encephalopathy”  makes a strong argument that MMA should be banned for youth, and made safer for professionals, the researchers say.

UFC should consider a rule that would halt the bout at least temporarily after a competitor is knocked down, and require mandatory imaging scans of fighters who suffer knockouts or TKOs, they say.

Read entire article…
Read entire study

In comparing boxing with MMA, the study is egregiously flawed. The standard for stopping a professional boxing match is of course that the fighter is unconscious or at least unable to move for a 10 count. In MMA the moment a fighter is in danger and unable to intelligently defend, the bout is stopped.

Comparing the reported 4.9 concussions per 100 athletes in boxing and unfavorably comparing that rate to MMA, without any medical professional actually assessing even a single UFC fighter, seems absurd, designed not to illuminate, but to garner misled media coverage.

Further, the authors are clearly not mindful of the fact that nearly every step taken to improve safety in boxing has had the opposite of the intended effect. Boxing gloves allowed harder blows leading to more head trauma, the standing 8 count serves only to prolong the amount of damage a fighter sustains, etc.

Yet another major flaw in the study is the assumption that CTE comes from KOs, rather than from repeated lesser trauma. There is no scientific evidence to back up the position.

The study's conclusion reads:
Conclusion: Rates of KOs and TKOs in MMA are higher than previously reported rates in other combative and contact sports.

A KO and TKO in MMA is not the same as a KO and TKO in boxing, so the entire conclusion of the effort is fundamentally flawed - comparing apples to oranges, without the understanding that they are different fruits. A monkey knows better.

The single step that would radically reduce brain trauma in MMA is, ironically, ending the use of gauze and tape on hands, or even the use of gloves.

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Recent Comments »

RockTheVote site profile image  

3/29/14 11:02 PM by RockTheVote

I think cte is real. I also think this "study" is amazingly foolish. I know i'm taking blows to the head. I try to do it in a safe way. I believe i'm healthier now than I would be if I still had my desk job and was forty pounds overweight. I would appreciate a real study, and not this sensational bullshit. If the author doesn't understand his subject he should be obligated to either learn more about it or pick another topic.

rkm456 site profile image  

3/29/14 9:13 PM by rkm456

Pro hockey players don't practice by hitting each other in the head. You have to total up how many sparring sessions an MMA fighter has in a year and add that to their fight total. People in denial can spin it anyway they want, but CTE will show itself to be prevalent as the sport ages.

Mihow site profile image  

3/29/14 6:16 AM by Mihow

Not at all

CDarwin site profile image  

3/29/14 5:58 AM by CDarwin

Regardless how dangerous MMA is or if the study itself is flawed, the most moronic thing about it is the comparisons imo. You get 2.2 concussion in 100 hockey "exposures" and 6.4 for MMA?. The thing is each hockey team plays 80+ games per season.  That means each hockey player  in the NHL is ten times as exposed to concussions per year compared to fighters in the UFC.  

XIII site profile image  

3/29/14 4:16 AM by XIII

That study might be 'flawed' but if you think that percentage is 0% and not 30%, you're just kidding yourself IMO.Let's just pretend that the guys that made the study are complete idiots and that concussions have no effect whatsoever. Sure. Go ahead.

inf0 site profile image  

3/29/14 3:21 AM by inf0

you need brain trauma to buy ufc ppvs  

donkypunch55 site profile image  

3/29/14 3:18 AM by donkypunch55

Fuck that's a damn good post.Vu

urch site profile image  

3/28/14 8:26 PM by urch


Mertvaya Ruka site profile image  

3/28/14 7:39 PM by Mertvaya Ruka

^ I would like to know what a guy like Herb Dean or BJM would think of that suggestion. Tweet them your idea :)

MasterofMartialArts site profile image  

3/28/14 6:52 PM by MasterofMartialArts

Jesus fucking Christ, these refs are dangerous