The Scale and the Brain: The Classification Gap in Vietnamese Martial Arts

It is morning at a gym by the Han River in Da Nang, and a nineteen-year-old fighter steps onto the electronic scale. He has gone almost two days without enough water. His lips are cracked, his eye sockets hollow, yet when the number settles on his weight class he still smiles. Nobody in the room applauds. His coach simply hands him a bottle of water and glances at the clock, as though time were the real opponent for both of them.

The night before, I sat in the stands at an indoor event, where the crowd's roar poured down onto the floor like rain. He won a points bout. But the thing I remember most is not the decisive kick. It is his hand trembling as he held the water bottle. Sitting in the stands in Moscow, I learned to listen with my eyes and to look with my ears. Here, between the drums and the whistles, I heard a question no one in the stands was asking: are we protecting the fighter, or protecting a way of naming things that is wrong?

Vietnamese martial arts do not lack layers. Vovinam, founded in Hanoi in 2026 by Nguyen Loc, built a system that includes both forms performed for display and full-contact competition divided by weight class. Alongside it sit traditional martial arts, karate, taekwondo, boxing, Muay Thai, and dozens of MMA gyms that have opened in major cities over the past decade. That richness is an asset. But that same richness is also hiding a gap.

Elsewhere in the world, the boundaries between disciplines are drawn clearly. Wushu separates taolu, routines scored on difficulty and quality of performance, from sanda, where two fighters actually punch, kick and throw one another. Professional boxing has four major bodies coexisting: the WBA, WBC, IBF and WBO, each keeping its own ranking system. That fragmentation is precisely what produces champions who have never faced the best. MMA has a unified ruleset and a system of medical boards standing behind every bout.

In Vietnam, most grassroots events have not separated two things: the classification of the discipline, and post-fight medical care. Based on my experience covering these bouts, the biggest risk is not the spinning kick or the takedown. It sits in the hours between the moment a fighter leaves the scale and the moment he steps onto the mat.

The death of a young fighter rarely begins with a strike. It begins with two days without water.

A body that cuts weight quickly loses water inside its cells, reduces blood volume, and increases the load on the heart and kidneys. At the severe end, muscle breaks down, releasing myoglobin into the blood, and the kidneys must filter something they were never designed to filter. The consequences have names: rhabdomyolysis, acute kidney injury, collapse at the weigh-in. Cases like these have appeared in many parts of the world, and they tend to happen not during the fight, but hours before it, when no referee is present to stop the bout.

More dangerous still, weight-cutting is a habit that spreads through results. When a fighter wins because he is bigger than his opponent in the same division, the training partner beside him copies the method. Nobody wants to be the only one stepping onto the mat at his natural weight. A gym advertises "discipline," and what is called discipline gradually turns into a collective ritual that no one dares break.

Next to that acute risk is a slower one that cannot be seen. Cumulative brain injury does not show itself in a single evening. It shows itself ten years later, in the form of headaches, changes in temperament, disrupted sleep. Chronic traumatic encephalopathy is tied to the total number of impacts to the head, not to the number of losses. That means an amateur fighter sparring three times a week for years can accumulate more impacts than a professional fighting a few big bouts a year.

The scariest thing in martial arts is not the hardest strike. It is the light strikes repeated long enough.

During the pandemic, the arenas were empty, yet I never heard the hearts of the fans more clearly. When gyms closed, many young fighters lost their rhythm entirely, and some of them came back training harder to make up for lost time. Those months showed me that the health problem in martial arts does not lie in the disciplines themselves, but in the pace at which people force their bodies to run.

We tend to believe that more rules mean more safety. The reality of martial arts shows the opposite in several cases. When a tournament adds weight classes to add more content, it also adds opportunities for fighters to cut weight and squeeze themselves into a lower division. When a federation opens another ranking system, it adds a shortcut to becoming "champion" without beating the best. Structure creates behaviour, and behaviour repeated long enough creates culture.

This is where a common misunderstanding from the outside comes in. Many foreigners look at Vietnamese martial arts and see something "traditional," "performative," "gentle." They assume the risk lies in the forms, on the stage, in the exhibitions. The truth runs the other way. The risk does not come from forms being scored. It comes from the most modern gyms, where a culture of weight-cutting, high sparring volume and a "never be weak" mentality arrives faster than the medical infrastructure that should accompany it.

Applying the measures of a professional combat sport to a performance discipline is an analytical error. But applying the culture of a professional combat sport to the body of an amateur fighter is a moral one.

I have seen strangers embrace in Moscow, and realised that football is a language needing no interpreter. In martial arts that language is even more direct: two people stand opposite each other, touch gloves, and trust one another enough to hand over their bodies for a few minutes. That trust only lasts when a system stands behind it, guaranteeing that today's loser still has enough health to return next season.

Some bouts last ninety minutes, but the story settles for decades. The story here will not be told in scores. It will be told in clinics, in collapses after weigh-ins, in former fighters of forty who cannot sleep through a night.

So what signal is worth watching in the coming months? Not the number of new tournaments, and not the number of medals. The real signal lies in a very specific question: whether a tournament dares to write a minimum rehydration period between weigh-in and bout into its rules, and whether a federation dares to make regular brain screening a mandatory condition of competition.

If that happens, it will not produce a single medal. But it will be the moment Vietnamese martial arts chooses to protect people before protecting results. And I will be the first to sit by the notice board in the gym, listening to the laughter of a fighter who no longer has to starve himself of water to stand in the right place.