Vietnamese Martial Arts and the Blank Boxes in the File: When Data Goes Missing, Who Pays?

I sat on the last bench of the training floor, four metres from the main ring. The wall clock read 5:40. The early-morning air in Nha Trang still held its salt, and the wooden floor was already soaked with sweat from the previous session. In my hands was a 41-page file on a nineteen-year-old fighter. Pages one through eleven were full of writing. Page twelve was blank. The "injury status" column was blank. The "weekly training load" column was blank. The "live sparring rounds in thirty days" column was blank.

I asked the coach standing beside me: "Why not write it down?" He looked at me, then at his student wrapping tape in the corner: "Write it for what? Nobody reads it."

That answer was not laziness. It was an accurate description of a system. And it reminded me of another kind of document I still receive every month: eight-dimension martial arts analyses, eight sections, three conclusions per section, two hidden-information items per section. Once I opened one and found every cell empty. No title, no source, no data. Only a single label left in the corner.

The person who built that report was not lying. They simply had nothing to write. And in silence, they still had to submit all eight sections.

Context: a martial arts scene rich in medals, poor in data

The 31st Southeast Asian Games, held in Vietnam in May 2026, is a milestone anyone following regional martial arts remembers. The host nation finished top of the overall medal table, and most of those medals came from combat disciplines: boxing, Muay, vovinam, wushu, karate, taekwondo. In the stands, the military drum corps was so loud I had to shout into my phone to record audio. Down on the floor, in the corner of the medical room, I counted seven fighters having their wrists re-taped in a single afternoon.

The medal count was published. Those other numbers were not.

Based on my experience following matches and training camps over many years, I can put it plainly: Vietnam has a martial arts scene strong enough to produce regional-level athletes, but not yet a data infrastructure thick enough to protect them. At club and training-centre level, fighter records exist in three fragmented forms: a coach's notebook, a phone message group, and the team doctor's memory. There is nothing wrong with those three forms until a fighter changes gyms, changes coaches, or changes weight classes.

At that point, memory becomes the only data. And memory cannot be produced before a medical panel.

I once witnessed a concrete case at a training centre in Khanh Hoa. A young fighter moved from one training group to another. The new coach asked: "Have you ever had a head injury?" The boy answered: "I don't think so." Three weeks later, during a sparring session, he went down after a hook. The team doctor had to phone the old coach to ask about his history. The old coach said: "He's had two, back in April and June."

Nobody had recorded those two. Nobody deliberately hid them. There was simply nowhere to record them.

The core: three layers of a single void

The data gap in Vietnamese martial arts is not one point. It sits in three overlapping layers, and each layer exists for a very different reason.

The first layer is medical. This is the emptiest and also the most dangerous layer. Medical confidentiality is a sound principle, but it is often used as a curtain for disorganisation rather than to protect athletes. Clubs publish only the injuries that suit them: a minor injury is announced to lower expectations before a bout, a serious one is silenced to protect contract value. The fighter sits between those two choices, and is usually the last person to learn the truth about his own condition.

In a combat sport, this does not stop at the level of information. It touches on a life. I have told young editors many times that in boxing and Muay Thai, the window between the weigh-in and walking to the ring is the most dangerous period of an entire career. A fighter in the 60kg class can lose four to six kilograms in the seventy-two hours before a weigh-in, mostly by dehydration. Nobody measures that water loss. Nobody keeps a record of how many times they have done it.

And that is the gap I consider the most expensive of all.

The second layer is training. Here the problem is not a lack of equipment. Many centres already have heart-rate monitors, tracking software, cameras recording sparring. The problem is that this data does not speak a single language. Each coach records his own way. One counts rounds, one counts minutes, one just writes the word "fine" in the margin.

An example I still remember. During a forty-seven-day camp in Nha Trang, I was allowed to live with the team. One morning I sat and counted the passes of a young midfielder: two hundred and fourteen passes, only twelve lost. But when I brought that number to the coaching staff, nobody had comparable data to check it against. My number was the only number that existed, simply because I was the only person sitting there counting.

In martial arts, this condition is worse. In football, a player runs eleven kilometres and that number is relatively easy to record. In boxing, a fighter throws two hundred jabs across six rounds, but that does not mean he trained correctly. The true intensity of a sparring session lies in the quality of reflexes, in decision-making speed, in whether a fighter can still hold defensive structure while exhausted. No device measures that if the person watching does not know what he is looking for.

The third layer is competition. Match data in Vietnam is scattered across many organisers, many federations, many overlapping competition systems. A fighter may compete in a national youth event, a club championship, a private promotion and an international tournament in the same year. There is no single identifier. There is nowhere holding enough to reconstruct that person's career as one continuous line.

This creates a consequence I consider the most serious of all: nobody can verify the quality of an achievement. A fighter with a ten-win, two-loss record sounds impressive. But if those ten wins all came against inexperienced opponents, what exactly is that number measuring?

Heat maps and the new astrology

There is another trend creeping into Vietnamese martial arts, and I will say plainly that it irritates me more than the emptiness itself.

It is the use of heat maps and movement charts to draw conclusions about a fighter without anyone asking whether the chart actually reflects that person's role in the tactical plan. A fighter ordered to hold distance, pin his opponent to the ropes, then throw three finishing blows will produce a chart that looks sparse compared with someone moving continuously for twelve rounds. Looking at the chart, we conclude the first man was inactive. We are wrong, but we are wrong in a very professional way, with full colour and statistics.

A heat map cannot measure intent. It measures movement, and movement is only the consequence of intent.

I once watched an internal analysis session where the presenter opened a chart, pointed at a red zone, and said: "This is the weakness." The fighter sitting below listened, nodded, and then changed his movement in the next bout. He performed worse. The analyst read the data correctly and misunderstood the human being.

This is why I always ask the first question before any data table: who decided this variable mattered? If the answer is "because it is measurable", then that table serves the person building it, not the person training.

Wrong frame: the trap of the label

There is one more error, and it is purely technical, which is why people overlook it.

Martial arts is too broad a label. Inside that label sit at least three entirely different worlds, and they demand three different ways of reading.

The first world is professional combat: boxing, Muay Thai, kickboxing, amateur MMA. Here what is measured is finish rate, strikes thrown and absorbed per minute, takedown defence. These indicators mean something because the ruleset allows a bout to end before time.

The second world is regionally specific hybrid combat such as sanda, where throws and takedowns carry enormous weight, and where scoring depends heavily on whether the opponent is pushed off the platform.

The third world is performance forms: routines, paired sets, disciplines judged on difficulty and execution quality. In this world the concept of a "finish" simply does not exist. There are no rounds, no strikes absorbed, no win rate.

Applying the statistical tables of the first world to the third does not produce a small error. It produces an entirely false conclusion, presented with a very precise appearance.

I have seen this happen. A young forms practitioner was assessed with the criteria of a ring fighter and declared "lacking fighting ability", while what he was pursuing was an entirely different scoring discipline. He was not weak. He was measured with someone else's ruler.

The counter-intuitive point: a void is not entirely bad

Here I must say something many colleagues will not like.

Not every data gap is a failure. Some blank boxes exist for a legitimate reason, and filling them indiscriminately can do more harm than leaving them blank.

I once wrote a long piece about a young fighter, and that piece nearly named an injury he had never disclosed. His manager called me at eleven at night. No shouting. Just one sentence: "He is only nineteen. If you write it, he will be called 'the one with the history' for the rest of his life."

I withdrew that line. And from then on I understood that there is a category of data that should not belong to the public. It does not belong to me, not to the audience, not to anyone who needs an article to publish.

But which void is a protective void, and which is the void of carelessness? That is the real question. The difference lies here: a protective void means someone already knows the content and deliberately chooses not to publish. A careless void means nobody knows the content at all.

In the case of the file on my desk that morning, nobody knew. Not even the fighter himself.

And this is where I want to pause a little longer.

When data is empty, people usually have two reactions. The first is to go and find data. The second is to fill the gap with conjecture. The second is faster, cheaper, and looks far more professional, because conjecture can be presented in tidy tables. An eight-section table with full headings will always look more credible than a sheet of paper with three blank boxes.

But what looks credible and what is correct are not always the same thing.

I have been in this trade long enough to see this loop turn many times. An event happens, rumours rise, parties begin to speculate, and when it is all over, people discover the initial conclusion was built on a single detail that was misread. In martial arts, that misread detail is usually injury status. A fighter is judged to be "in decline" when in reality he is training through an unhealed hand. A fighter is called "mentally weak" when in reality he has been over-dehydrating for weeks.

In combat sports, the body does not lie. Only the record is silent.

And the reader of that silence is not the audience. The reader of that silence is the next coach, the next doctor, the fighter himself five years from now when he needs to know why his head aches every time the weather turns.

The economics of absence

There is a simple economic reason behind all of this, and I think it needs saying because it is rarely mentioned.

Keeping records costs money. Not much money, but it costs the time of someone with expertise. A provincial training centre may have three coaches for forty fighters. The third of them has to teach, coordinate schedules, and worry about food and lodging. Sitting down for twenty minutes after a session to write records does not win a medal that month. It only pays off in three to five years.

When budgets are tight, people cut the things whose benefits are distant. This is not ignorance. It is a rational economic decision inside a flawed structure.

Fixing that structure does not require high technology. It requires one simple rule: a fighter's basic data must travel with the fighter, not with the coach. If three basic columns were recorded consistently and transferred when a fighter changes gyms, most of the stories in this article would not exist.

I said this once at a small meeting with a few young coaches. One of them asked back: "But who keeps the records? The federation or the club?" That is the right question, and it shows the problem is not technical. It is about ownership.

Data ownership and owning a person

In any combat sport, a fighter's personal data is a form of property. It can raise contract value, lower transfer value, decide national-team selection. Whoever holds it holds the right to interpret it.

In Vietnam, that right is currently fragmented and largely sits with selectors. That means fighters have almost no voice in their own technical image. When a fighter moves to another unit, he does not carry his history with him. He starts again from zero in information terms, even though he has accumulated years physically.

This is why I rarely write about transfers in martial arts in the usual way. A transfer can change a squad, but it cannot change an identity carried out of the training ground. Yet in a system without records, a transfer also changes identity and memory. That is a double loss.

A second counter-intuitive point: good analysis is not full analysis

There is a professional habit I consider the most dangerous in the current era: assuming a good analysis must be complete.

Eight sections. Three conclusions each. Two hidden-information items each. This structure works well when data exists. When data does not exist, it becomes a text-producing machine. And the output of that machine is very hard to distinguish from real output, because it imitates the exact shape of the real thing.

It took me years to learn that a void is also a result. You record that you have no medical file, that you do not know the condition of a fighter's hand, that weigh-in figures do not exist. One sentence like that is worth more than a page of polished speculation.

Because when you record the void, you protect the reader from a false conclusion. When you fill the void, you do not only deceive the reader. You also make yourself believe.

And a system in which everyone believes false conclusions runs smoothly, right up until someone goes down in the tenth round.

Where the real pulse is

The truest pulse is not in the stands. It is under the feet of early-morning sessions.

That morning, after I folded the file, the session began. The nineteen-year-old fighter stepped onto the floor. He wrapped his hands slowly, evenly, four loops each. I noticed he used his left thumb to press down the tape at his right wrist, the spot the doctor had said had swollen many times. Three weeks earlier, it had hurt. Nobody recorded it.

Then he started training. Twenty rounds of skipping, three minutes each. He skipped exactly on the beat, without looking at the clock, without anyone counting. By the eighteenth round, his speed had not changed. I sat and counted. And I realised what I was doing was merely a transcription of something his body had stored long ago.

When the stadium is empty, we clap from a distance to remind each other that a heartbeat needs no distance. But if nobody records that pulse as a number, then each new generation of fighters will have to remember it from scratch, with their own bones.

At sixty-two, I have learned that time does not make a team older, it only makes the story thicker. And in those thick stories of Vietnamese martial arts, page twelve is still blank.

What to watch next

The signal I will follow over the next six months does not lie in medals. It lies in whether any training centre in Vietnam begins recording those three basic columns for each of its fighters, and keeps them across at least one change of coach. If one place can do that, I will travel to their training floor, sit on the last bench, and start counting.