The Blank Split Column in Vietnamese Swimming: When a Sports Writer Must Learn to Say 'I Don't Know Yet'

On the electronic scoreboard of a youth swim meet in Hanoi, a thirteen-year-old girl's race time appeared and vanished within three seconds. I managed to photograph it before the screen changed. When the organisers sent the results file to the press, the split column — the data broken down into each 50 metres — was empty, leaving only a single total time. A coach sitting beside me shrugged: "Once they finish, we know who beat who. Why split it up?" I wrote the sentence down in my notebook without comment. Months later it came back to haunt me every time I opened a swimming analysis: people tell wonderful stories about races nobody actually saw from the inside. A STRETCH OF THE OLYMPIC CYCLE TOLD THROUGH MEMORY, NOT DATA In 2026, when I was nineteen, I mispronounced the name Kylian Mbappe three times in a row on local radio during the France-Argentina quarter-final. Mocked on social media, I spent a month rewatching every France match, recording international commentators' voices and training against the phonetic charts. From one mispronunciation at a World Cup, I understood that football does not begin with the foot, but with the ear. That lesson followed me to the pool: if I can get a name wrong, I can get an entire acceleration phase wrong that I never actually watched. Vietnamese swimming has passed through one complete Olympic cycle and left behind very little that can be looked up. From London 2026 to Tokyo 2026, Nguyen Thi Anh Vien carried the entire national women's programme on her shoulders. At Rio 2026 she placed ninth in the 400m individual medley heats, exactly one place short of the final. It was a result so fine that domestic media called it "history", yet I have never seen a complete split sheet from that swim published for the Vietnamese press. I know where she lost in terms of position; I do not know where she lost in terms of time. In the men's pool, Nguyen Huy Hoang achieved what no Vietnamese male swimmer had done before. At the 2026 Asian Games he won silver in the 1500m freestyle and bronze in the 800m freestyle. Four years later, at the Paris 2026 Olympics, Vietnam sent exactly two swimmers to the biggest stage on earth: Nguyen Huy Hoang in the freestyle events, and Vo Thi My Tien in the 200m individual medley. Two berths. That was the entire swimming delegation of a nation of nearly one hundred million people, at a Games where swimming awarded thirty-five gold medals. By comparison, Singapore had Joseph Schooling, who won the 100m butterfly at Rio 2026 in 50.39 seconds on 12 August 2026, ending Michael Phelps' dominance in his signature event. Thailand, Malaysia and Indonesia all have established names and accompanying data systems. Vietnam has wonderful stories about its swimmers, and very little published data that anyone outside a technical meeting room can verify. That shortfall is not only a problem for writers. It is a problem for parents looking for a place for their child to train, for provincial coaches looking for metrics to compare their athletes with those elsewhere, and for sponsors weighing whether to fund a young swimmer. Everyone has to decide, yet almost nobody is given enough data to decide correctly. THREE LAYERS OF DATA THE RESULTS SHEET NEVER PRINTS A standard Vietnamese swimming results sheet has four columns: name, year of birth, province or club, total time. Those four columns answer exactly one question — who finished first. They answer none of the questions that genuinely matter. The first layer is the split for each 50 metres. In a long freestyle event, splits show how an athlete distributed effort across segments. A swimmer who goes very fast over the first 50 metres and then free-falls over the last 400 has a completely different problem from one who swam evenly and faded over the final 150. The same total time, two different diagnoses, two different training plans. Without splits, a coach can only judge by feel. The second layer covers the metrics that never appear in a time: reaction time off the blocks, number of kicks off the wall, and the depth and length of the underwater phase after the start and after each turn. At continental level, the gap between two swimmers is usually created in exactly these places rather than mid-lane. A Vietnamese swimmer can have the most beautiful stroke in the building and still lose 1.5 seconds over 200 metres simply because of a weak underwater phase and slow turns. The third layer is the hardest: stroke rate and distance per stroke. Only those two numbers together reveal true efficiency. An athlete who raises stroke rate while distance per stroke falls is losing efficiency, even if they look more aggressive. Conversely, a lower rate with greater distance per stroke signals technical improvement. To obtain these metrics, someone has to sit with a stopwatch and count strokes per length. No device automatically sends that data to anyone's laptop in Vietnam. I have counted this way myself. In 2026, when stadiums fell silent during the pandemic and I moved entirely to watching sport on screens, I was struck by Federico Chiesa's relentless off-ball movement in Italy against Turkey at the European Championship. I sat with a stopwatch for ninety minutes and counted thirty-four pressing actions, the highest in the match. The article "Chiesa — The Fire Who Is Not a Star" was born from that, with a small table stating plainly: data counted by my own hand. Pressing data does not lie, but it does whisper the name of a star still asleep. I believe that applies to swimming exactly as it does to football, except that in swimming people are lazier about counting. THE TRADE IS PRODUCING HOLLOW ANALYSES During my career I encountered a situation that I later understood was a systemic problem rather than a personal mishap. I received a nine-dimension analysis of a swimmer, painstakingly drafted, with every section filled in: technique, performance, competition system, regional landscape, rules and doping control, career trajectory, risk profile, media narrative, industry ripple effects. Every section had tables, every section had conclusions, every section had risk warnings. When I checked the input data section, every field was blank. No swimmer's name, no event, no times, no sources. The entire analysis was a perfect skeleton erected over a void, and it declared itself unable to assess anything — yet still produced nine confident-sounding chapters. What chilled me was not the technical error. What chilled me was my own reflex while reading it: I found it plausible. I found its use of concepts like "prodigy filter", "puberty barrier" and "puberty risk" very smooth, and I almost nodded along to warnings about doping control that nobody in the document had mentioned. A framework powerful enough can convince a reader that content exists, simply because its form is full. In Vietnamese sports journalism this phenomenon appears everywhere in a milder but far more common form. A swimmer who fails to meet a qualifying standard is described as "mentally weak" when nobody has measured any psychological indicator. A swimmer who loses over the final 50 metres is described as "out of gas" when nobody has splits to show at which metre the tank emptied. A fifteen-year-old talent is called a "prodigy" after one youth meet, without anyone stating clearly where they stand in the national rankings for their age group. Each time this happens, a little trust is withdrawn. Nobody objects outright. Readers simply stop reading the analysis and turn to the medal table — the only place they believe real data lives. THE 1500M FREESTYLE AND THE LESSON OF THE FINAL 300 METRES The men's 1500m freestyle is an almost perfect case study for the data argument, because it is too long for instinct to cover and too short for tactics to be meaningless. Thirty laps in a 50-metre pool. Looking only at the total time, a spectator cannot distinguish a swimmer accelerating from the 900m mark from one falling apart from the 900m mark. At the 2026 Asian Games, Nguyen Huy Hoang won silver in the 1500m freestyle. It remains the best result by a Vietnamese male swimmer at an Asian Games. But if you asked me three questions — where was he fastest, where did he lose the most speed, and what would he have swum had he held his first 400-metre pace — I could not answer with data, only with speculation. A split sheet for that event would give Vietnamese coaches more than a medal. It would reveal the effort-distribution model of a continental swimmer: where they hold pace, where they lift, and where they endure. It would turn a medal from a souvenir into a syllabus. In Vietnam, medals usually stop at being souvenirs. Swimming differs from football here. Football has hundreds of data companies logging every pass, while swimming needs one person in the right seat with a stopwatch and a sheet of paper. The cost of Vietnamese swimming data is unbelievably low. The paradox is that the cheapest thing is the most neglected. I once sat in the stands at a national meet and tried to time each 50 metres of a long freestyle event. I mis-timed it. I mis-timed three consecutive laps. There were no indicator lights, no pacing signals, and the noise inside the arena made me lose track of the swimmer's hand every time they went under. That was when I understood why nobody does this work: it is hard, nobody pays for it, and nobody praises it. In Vietnam, data often dies of the second reason. THE 400M MEDLEY IN RIO AND THE FORGOTTEN NAME IN NINTH PLACE Nguyen Thi Anh Vien at Rio 2026 is the clearest example of how missing data distorts an entire national story. She placed ninth in the heats of the 400m individual medley, one place short of the final. Media framed it either as the failure of a swimmer not yet ready for the Olympic stage, or as the success of someone who had come within a whisker of the world's best eight. Those two narratives are diametrically opposed, and both were written without a single line of data. With splits across four strokes, the story would change immediately. Butterfly, backstroke, breaststroke, freestyle. A total time dragged down by a slow, laborious breaststroke leg requires a completely different training plan from one dragged down by a loss of rhythm across the first two legs. In the 400m medley, the largest gains usually come from the weakest leg, not the strongest. I do not have that data. I found no Vietnamese-language source publishing it, and even international databases store only a single total time for her heat swim. This is worth stating in an article about Vietnamese swimming: the most talked-about swimmer in the nation's history is also the swimmer whose data has been lost most thoroughly. From 2026 until she left the elite stage after three Olympic Games, the technical gap between her and Asia's leading group could only be estimated, never proven. Every article I wrote about her stood on a shaky foundation I could see clearly but could not repair. A footballer only truly speaks when the ball sits between the studs and my curiosity. For a swimmer, that curiosity has to be paid for in data, and I did not have enough money. THE PRODIGY FILTER AND THE PUBERTY WALL There is a question Vietnamese swimming has asked itself for years without ever answering with numbers: what happens to female swimmers between the ages of fourteen and seventeen? Anyone who follows youth meets will recognise the pattern. A twelve- or thirteen-year-old girl swims very fast, far ahead of her peers, is called a talent by the press and registered in a youth squad. Three years later she still swims well, but no longer stands out. Four years later she has vanished from the start list. There are two common explanations. The first is biological: the body changes during puberty, the strength-to-mass ratio shifts, technique breaks down, and some swimmers lose their earlier advantage. The second is systemic: once a swimmer ages out of the priority-funded group, the training environment, nutrition and sports medicine support are no longer sufficient for continued progress. I lean towards the second explanation, but I must be honest: I have no data. To prove the first, one would need height, weight, performance metrics and medical screening results for the same cohort year by year. To prove the second, one would need statistics on training hours, sessions with specialist coaches, and annual financial support. Vietnam publishes neither dataset. Without data, both explanations coexist and both are deployed to suit the user. Parents who want to pull their child out of the pipeline choose the first for peace of mind. Coaches who want to keep an athlete choose the second and argue they simply need more resources. Nobody is wrong, because nobody has anything to be wrong with. In that environment, a prodigy filter built on instinct will repeatedly push the wrong people forward and send the right people home early. A fourteen-year-old who swims half a second slower than a peer may be judged to have no potential, when that margin sits within the error of one poor start. Another who swims very fast over short distances may cause an entire programme to be designed around her, only to lose that speed at seventeen. What is most regrettable is that at that age, they still have time. International swimming is full of athletes who peaked at twenty, twenty-two, even twenty-five. Katie Ledecky was still winning Olympic gold past her twenty-fifth birthday. Having to decide a swimmer's fate at fourteen, without benchmark comparison data, is an extremely effective way of destroying potential. HOW THE WORLD PRINTS ITS DATA To see the gap, compare how an international meet organises data with how a domestic meet does. At the Paris 2026 Olympics, results for every swimming event were published with each athlete's reaction time off the blocks, splits for every 50 metres, and the coach's name and year of birth. Anyone with a phone could check for themselves whether a swimmer sped up or slowed down over the second half of a race. Leon Marchand won four gold medals at Paris 2026, and every one of those golds came with a detailed lap-by-lap split sheet available to anyone who wanted to dissect it. At a domestic meet, what you get is a PDF with total times, occasionally annotated "did not achieve" or "withdrew". Looking up a swim from three years ago usually means asking a contact inside the organising committee to resend the file, and even that is not guaranteed. This asymmetry produces a very specific professional consequence. Writing about domestic swimming, a journalist has no raw material for technical analysis, so they switch to emotion. Writing about Vietnamese swimmers on the international stage, a journalist has raw material, but it is supplied by the international organiser rather than the domestic system. The result is that Vietnamese swimming is understood best from outside and most vaguely from within. A provincial coach wanting to know where their athlete stands nationally faces the same wall. They can phone colleagues, ask in group chats, recall meets they attended. They have no database to check what the best national time is for a female swimmer born in 2026 in the 200m individual medley. Every sport is its own universe, and I am lucky to be a traveller between those orbits. But travelling between universes without a data map is just organised wandering. THE CONTRARIAN ANGLE: MORE DATA WILL NOT SAVE THE TRADE Here I must say the opposite of everything I have written so far. If you think the solution for Vietnamese swimming is to have a great deal more data, I believe you are heading the wrong way at exactly one point. I have seen an analysis with a complete framework, complete dimensions, complete tables, complete risk warnings, and not a single piece of real data. It did not fail for lack of numbers. It failed because whoever produced it had no mechanism forcing them to stop and write two words: "not known". Adding data to a process with no brakes will only produce analyses that are more fluent, more detailed, more confident and more wrong. What Vietnamese sports writing needs first is not data. It needs the right to say that data does not exist. This is the counter-intuitive point that took me years to accept. In this trade, writers are rewarded for certainty. An article with a clear conclusion is always shared more than one saying there is not enough evidence to conclude. Article structure is taught as a compelling opening, an evidential body, an assertive close. There is no room for a gap marked with a question mark. The consequence is that Vietnamese sports writers, including decent and careful ones, tend to fill the gap with reasoning that sounds entirely plausible. I have done it. I have written that a swimmer lost the final stretch because of poor conditioning, when all I had was a total time and a forty-second video clip. The right direction, I believe, lies elsewhere: distinguishing clearly between what is measured and what is inferred. An honest analysis can be fifty percent inference, provided the reader knows exactly which part is inference. Marking that boundary does not weaken an article. It makes it more credible, because readers know where the writer is limiting themselves. And there is something else, more uncomfortable. Demanding data from the system will not automatically improve data quality if nobody in that system is accountable for publishing it. Vietnamese swimming lacks data not because data is hard to create. That data exists in coaches' notebooks, in officials' personal files, on the hard drives of people who film races. It simply never reaches the light, because nobody benefits from bringing it out, and some may be disadvantaged if it appears. That is why I no longer believe the problem in Vietnamese swimming is technical. It is a problem of incentives to publish. WHAT I WANT TO TRY NEXT SEASON I will start with the cheapest thing. At every swim meet I attend, I will sit in a fixed seat, time each 50 metres of at least three long freestyle events, and record my own margin of error. I will publish that margin too, so readers know how good this data actually is. I will build a glossary of Vietnamese swimmers' names the way I once built one for football matches, checking pronunciation and spelling across multiple sources, because a misspelled name is also a form of bad data. And I will write at least one article containing a section that states plainly: here, I have no data. I want to see how Vietnamese readers respond when a sports writer is honest about their own gaps. I believe they will keep reading, and that some of them will send me exactly the numbers I am missing. I run like an athlete, jump between sports like an adrenaline addict, and at some point I have to choose one place to stand for longer than a single season. The pool is where I choose. But I will not stand there with a full-bodied analysis erected over a void. I will stand there with a stopwatch, a sheet of paper ruled into thirty segments, and the truth that most of what I am about to write remains out of reach. If you are the one holding the data, I am right here.