One Data Cell, Three Martial Arts: Why Vietnam's Combat Sports Medal Table Cannot Be Used for Analysis

May 2026, SEA Games 31 in Hanoi. That afternoon I wrote two lines on the same page of my notebook. The first line: a Vovinam athlete steps onto the mat, performs a form, the judges raise their scorecards. The second line, a few hundred metres away: a boxer enters the third round, takes a right hook, and the referee starts counting. The two events have nothing to do with each other. Different scoring. Different ways of building a human being from age twelve to age twenty-four. Different ways of walking into a contest and walking out of it. But in my notebook they sit in the same column: martial arts. I still keep that page. It is evidence of a systemic error I run into at almost every major Games: Vietnamese sport counts medals from performance martial arts and medals from combat martial arts in the same cell. One side is a technical score awarded by judges on a fixed scale. The other is a result confirmed by a referee after two people actually fight. Merged together, the medal table looks better. In exchange, it becomes almost unusable for analysis. Vietnam closed SEA Games 31 with 205 gold medals, topping the standings, and the martial arts group contributed a large share of them. The official programme that year included Vovinam, a martial art created by Vietnamese, alongside boxing, karate, taekwondo, judo, wushu, pencak silat and muay. In the same year, LION Championship launched and was presented as Vietnam's first professional MMA promotion, with contracts, broadcast rights and tickets sold to spectators. So within one country, in one year, three entirely different sports products exist, and all of them answer to the same name. The first group is performance martial arts: Vovinam, forms, weapon forms, wushu taolu. The athlete steps out alone, in front of judges, with no direct opponent and no strike aimed at the head. The second group is amateur combat: Olympic boxing, taekwondo, karate kumite, judo, wushu sanda. There is an opponent. There is contact. There are weight classes. There is a round limit. The third group is professional combat: professional boxing and MMA. There is an opponent, there are weight classes, and there is one more thing the other two lack, namely revenue that decides how long a career lasts. These three groups share not a single measurement. Yet in performance reports, in sponsorship files, in the way media names them, all three are martial arts, and everyone who trains is a fighter. Data does not betray us; we simply place our trust in the wrong place. The problem is not a labelling exercise. It decides where the money goes. Vietnam's high-performance reward mechanism is calculated on medals won at international events. A gold medal in a performance event and a gold medal in a combat event are converted into comparable amounts. To a planner, the two are the same. To someone sitting in the gym, they are so different they cannot be compared. Take an example inside a single federation. Wushu has two disciplines: taolu and sanda. Taolu is scored much like gymnastics, on difficulty, precision, stability of movement, with deductions for loss of balance. Sanda is combat with weight classes, scored on effective strikes and takedowns. One federation, one uniform, one line in the standings. A taolu athlete can train ten years without ever taking a punch to the face. A sanda athlete can take ten such punches in a single session. I have sat close enough to hear that difference through the eardrum. The sound of a form is breath held tight, a foot landing on the mat, fabric pulling taut at the end of a movement. The sound of a sanda bout is impact, ragged breathing between rounds, a coach shouting one single syllable from the corner. Those two sounds do not belong to the same sport. They only share a label. The label confusion produces three concrete consequences I needed a few years to see in full. The first is medical. To monitor head injury in an athlete, you need cumulative data on strikes absorbed, knockdowns suffered and rest days between bouts. For a taolu athlete those figures are zero, and that is an honest result. When both groups are merged into one file, the zero group dilutes the group with real risk. The statistics therefore always look better than reality, and the group that pays for it is the combat group. Within the combat group, weight classes are part of the rules. Fighters must weigh in, must cut, must rehydrate within a few dozen hours before the bell. That is a medical process with real risk, and it needs its own surveillance. No taolu athlete ever has to do it. Merged into one file, we lose the ability to catch dangerous weight cuts early, because half the people in that file never step on a scale. The second consequence concerns talent selection. Performance martial arts reward stability and the ability to repeat precise movements under judging pressure. Combat rewards split-second decision-making while an opponent is moving and actively trying to hit your face. These two athlete types are selected through different tests, fed by different training plans, recovered by different protocols. A merged training centre will always have to sacrifice one, and the one sacrificed is usually the side with fewer medals on paper. The third consequence is market-related. No bookmaker prices a form. No broadcaster pays a rights fee for a taolu scoring session. Professional boxing and MMA, by contrast, survive because each bout is a sellable product and each fighter is an asset with a price. A shared label makes the market segment look larger than it is, while the segment with no market is shielded from any pressure to change. Based on my experience covering bouts and major Games, the most serious mistake is not that we count medals wrongly. It is that we use a correct count to answer an entirely different question. There is a quieter second error: naming people with the label of the trade. Nguyen Tran Duy Nhat, who carried Vietnamese Muay Thai onto the world stage, and professional boxers such as Truong Dinh Hoang, or women's boxer Nguyen Thi Tam, work under three different rule sets. Writing them into one word, fighter, sounds respectful, but it actually erases each person's profession, rule set and financial trajectory. Misname one person, and you remember the lesson for life. The counterintuitive part is this: the martial arts label, which the public assumes is a symbol of strength, currently serves as a shield protecting structural weakness. At many Games, performance events deliver the most reliable medals, and for that very reason they face the least pressure to reform. Meanwhile the groups that can genuinely create long-term value, professional boxing and MMA, are treated as secondary, because their medal count is a fraction of what performance events collect. One more case has occupied my mind for longer. Vietnamese women's boxing has produced fighters who win medals at regional and continental level. But the number of their bouts shown live has barely grown, and the number of sponsors attached to individual athletes has not grown with it. Sponsorship slots still arrive on holidays and anniversaries, as a line in a corporate social responsibility report. The medals are real; the market behind them is not. When the arena is empty, the loudest applause is your own. But to reach that arena, each group of fighters needs its own name, its own scale, its own way of being counted. Vietnam has enough people to go further than the medal table suggests. What needs doing now is not adding medals, but splitting the data cell before it keeps hiding what is actually happening on the mat.