Vietnamese Martial Arts at the SEA Games: Glory and the Data Gap

In 2026, in Hanoi, Nguyen Loc introduced a martial arts system he named Vovinam. What stands out is not the techniques themselves. It is that Nguyen Loc built a curriculum with ranks, forms, sparring, something that could be tested, measured and passed down across generations. Nearly nine decades later, I sat in the stands of a hall in Ho Chi Minh City, notebook in hand, and asked myself: what have we actually measured from that legacy?

The answer is short. Far shorter than a nearly century-old martial tradition deserves.

I report on sport, and I came out of track and field. To me, a race only means something when there is a clock. A jump only means something when there is a tape measure. Martial arts are different, and that difference is exactly the problem.

Vietnamese martial arts sit on at least three tiers. The first is traditional and semi-traditional styles, with Vovinam as the most visible face, alongside schools such as Thieu Lam, Binh Dinh and Tay Son. The second is modern combat sports inside the international competition system: boxing, taekwondo, karate, judo, wushu (sanda), pencak silat. The third is demonstration events, where forms are scored on technical criteria.

These three tiers run on three different measurement systems, and they rarely meet. That is the root of everything I am about to say.

At the SEA Games, Vietnamese martial arts are most visible at editions where the host nation puts the sport on the official programme. SEA Games 31 in 2026 in Hanoi is the most recent example: Vovinam was included in the competition list, alongside familiar martial arts. Vietnam finished those Games at the top of the medal table, a run I followed closely and logged day by day.

But a medal, in itself, is not data. A medal is a final result that has passed through a long filter. It does not tell you why an athlete won, by what margin, or whether that margin can repeat at the next edition. A gold medal can be the peak of a lifetime, or it can be the luck of a single afternoon. Looking at the medal alone, you cannot tell those two cases apart.

In track and field, I am used to one principle: results do not lie, but results do not tell the whole story either. A sprinter who runs the 100 metres in 10.20 seconds can win at one meet and lose at another, depending on wind, altitude and track quality. So we do not record time alone. We record the conditions that produced it. Without that context, the number is just a loose scrap of paper.

Combat sports can apply exactly that logic, but most of the time they do not. A three-round sanda bout is not logged by strikes landed, by the number of times a fighter broke distance, or by the seconds spent pinned in a corner. A boxing bout is not logged by recovery heart rate between rounds, by how often the lead foot lost balance, or by actual distance covered. We remember who won. We do not remember why.

People see a fighter throw a strike; I want to see how he plants his heel on the canvas. That heel is the raw data. It decides whether the strike carries power. It decides whether the fighter can still stand in round three. Everything flashy on top is built from that heel.

This is where I recall the principle I still use when analysing football: I count every stride to find the man who does not want to run. In martial arts, footwork is not just movement. It is testimony. A fighter who takes half a step back too often in round two is telling me his tank is emptying, even if his face stays calm. A fighter who stands still too long is telling me he is waiting for one single opening, and if it never comes, he has run out of options.

Who is hiding their fatigue on the mat? That is the question I carry into every arena. And it is precisely the question that movement data can answer, if anyone bothers to collect it.

On the demonstration tier, the problem runs the other way. Forms are scored, which means they have a scale. But that scale rests largely on subjective criteria: precision, power, balance, rhythm. Judges award points, and those points are hard to reproduce between attempts. Two judges watching the same form can differ by half a point, and half a point sometimes decides the colour of a medal. That is not the judges' fault. It is the limit of a soft measurement system.

What I want to stress is this: Vietnamese martial arts are strong on the tier with a soft scale, and lagging on the tier with a hard scale. In demonstration events, where experience and tradition are valued, we hold an advantage. In professional combat sports, where everything reduces to numbers and conditioning, we remain far away. Both facts coexist, and they do not contradict each other.

I once attended a training session with a young boxing squad. The coach had the athletes wear heart-rate monitors and counted strikes per round. He told me something I wrote down word for word: "I don't need to know whether it looks pretty. I need to know how many punches it can still throw in round three." That is data thinking. And it is still the exception, not the rule.

There is another paradox worth noting. Vovinam has gone out into the world. The style is now taught in many countries, with an international federation and cross-border competitions. From one angle, that is a cultural achievement to be proud of. But seen through the lens of data, a style travelling far raises a different question: we can export the system, but can we export the ability to compete in combat? Those are not the same thing. A martial art can spread across five continents and still lack fighters of real calibre on the professional circuit.

At the youth-development tier, the problem is even clearer. A boxing or sanda athlete needs about a decade to mature. In those ten years, he needs nutrition, sports medicine, opponents of matching level, and a competition system dense enough to test him. Miss any link and he will stall at some ceiling, and that ceiling is usually lower than his real potential. We tend to see an athlete only when he has reached the top, or when he has already quit. We do not see the ten years in between. But it is those ten years in between that decide everything.

Across the region, we are not the only nation wrestling with this. Thailand is strong in Muay Thai, the Philippines has a boxing tradition, Indonesia and Malaysia have pencak silat. Each country picks a direction and invests in it for the long haul. Vietnam has many sports and many medals, but few sports funded all the way through. That spread carries a cost.

I have a professional habit I brought from track and field into martial arts: three-layer verification. The first layer is the source of the number. The second is recalculating it. The third is cross-checking against an independent source. Three layers of checks are not there to find the truth, but to calculate how many times the truth can survive being distorted. In martial arts, where data is still thin, those three layers are almost mandatory, because a wrong number spreads faster than a right one.

Over the years, I have learned that probabilistic caution is not hesitation. It is how a conclusion holds up. When I say Vietnamese martial arts are short of data, that is a high-probability judgment based on what I have observed, not an accusation.

Here I have to say something plainly that may annoy some people: medal hauls in demonstration martial arts do not translate directly into combat strength. We can win a great many forms medals, performance medals, and still not have a single fighter able to compete on the international combat stage. Those two numbers are not in the same unit. Adding them together is a miscalculation, and that miscalculation is repeated every Games.

More dangerously, that abundance of medals creates a data illusion. The medal table looks good. The news looks happy. And an entire martial tradition quietly stands still inside its comfort zone, with no one forcing it to answer the hard question: if we set all the demonstration medals aside, what do we have left on the combat mat?

I think of the image of the tank tread I still use to describe the things that are not glamorous but decisive. In martial arts, that tread is the conditioning base, the movement data, the youth scouting system. No one photographs the tread. It never appears in any beautiful frame. But without it, the vehicle cannot cross the mud.

So what is needed? Not a grand revolution. Small things done consistently: logging data from every bout, measuring fighters' heart rates and distance covered, building a shared database for national teams, and, most importantly, accepting that the numbers may say things we do not want to hear.

Data never shouts, but it will repeat until you are willing to listen.

I still believe Vietnamese martial arts have enough raw material to go further. But that belief, if it stays only in emotion, will remain a belief. If it is measured, verified and recorded, it becomes capability. And capability is the only thing that steps onto the mat with the fighter.