‘Slap fighting’ causes long-term brain damage – study
Tasleem Gierdien
13 August 2025 | 7:47Often competitors are knocked out, wake up, and get knocked out again. It’s asking for trouble, says Professor Jon Patricios, Founder and Director of Sports Concussion South Africa.

Slap / Wikimedia Commons: Freya Spargo
CapeTalk's Lester Kiewit speaks to Professor Jon Patricios of Sports Concussion South Africa.
Listen below:
Slap fighting, also known as ‘Power Slap’, is a licensed combat sport where competitors take turns delivering open-handed slaps to each other’s faces. The objective is to knock out the opponent or win on points after a set number of rounds.
Popularised by UFC president Dana White, the sport is sanctioned by the Nevada State Athletic Commission. During matches, contestants stand face-to-face with no protective gear. One competitor delivers a slap while the other must remain still, no flinching, ducking or dodging allowed.
After a short recovery period, the roles switch. Judges score the bout based on performance and damage dealt.
But the brutal nature of the sport has raised serious concerns. Fighters are often knocked out, revived, and then knocked out again, which, according to Professor Patricios, is 'asking for trouble'.
A recent University of Pittsburgh study found alarming evidence of brain injury in slap fighting. Researchers analysed 78 matches, 333 slaps, and 139 slap sequences involving 56 Power Slap competitors. The results showed that nearly 80% of fighters displayed at least one visible sign of concussion during a match.
More than half of all slaps or slap sequences resulted in signs of concussion, such as loss of balance, blank stares, delayed response, or motor incoordination.
The findings highlight serious safety concerns and the need for a deeper investigation into the long-term effects of repeated head trauma in slap fighting.
“Concussion is a traumatic brain injury,” Patricios explains. “And the intention is to deliberately injure that person’s brain, which may lead to serious, long-term consequences.”
"Concussion is a traumatic brain injury; there is damage to the brain, and the intention of slap fighting is to deliberately injure that person's brain. It seems you're putting yourself into a situation where your brain is at risk... one could argue that perhaps rugby players do this as well, but the big difference is that here it is intentional whereas in rugby we're doing everything we can to protect the players' head and neck, so it's a very different scenario."
- Professor Jon Patricios, Director - Sports Concussion South Africa
"The other thing that worries me is the repetitive and deliberate nature of this."
- Professor Jon Patricios, Director - Sports Concussion South Africa
"From a medical point of view, I think it's bizarre that you're not allowed to protect yourself... it's a very one-sided combat... acute injury to the brain, which may be catastrophic... even death from something called Second Impact Syndrome... the brain sustains a second blow before it's recovered from the first... can be disastrous; that second blow doesn't have to be as hard as the first one... competitors are asking for trouble."
- Professor Jon Patricios, Director - Sports Concussion South Africa
"We don't know how to measure the effects of repetitive injury... There is a likelihood that multiple traumatic events may cause chronic long-term brain injury, including things like dementia, Parkinson's... I fail to see the upside."
- Professor Jon Patricios, Director - Sports Concussion South Africa
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