The Empty Logbook of Vietnamese Swimming: When Swimmers' Injuries Go Uncounted

THE EMPTY LOGBOOK OF VIETNAMESE SWIMMING: WHEN SWIMMERS' INJURIES GO UNCOUNTED AN AFTERNOON AT THE POOL In December 2026, at the national swimming championships held at the Phu Tho pool complex, I sat in the fourth row with my notebook open, waiting for the women's 200m individual medley final. At the last moment, a swimmer I had been tracking for three days withdrew from the start list. The announcement over the loudspeaker carried four words: not enough stamina. I walked down to the team's preparation area and asked the coach: where does it hurt, which structure, how long out. He looked at me for a moment and said the kid's shoulder had been sore for months, probably from too much training. I asked which shoulder, dominant or non-dominant arm, had anything been scanned. He shook his head. No file. No onset date. No range-of-motion test. Nobody had written anything down. That was the first time I understood something that still holds twenty years later: on a Vietnamese pool deck, the athlete's body has no secretary. Injuries happen, get retold as sensation, get remembered as memory, and vanish when the person telling the story changes jobs. There are injuries that live not in tendon or muscle, but in the way we look. I am not writing this to assign blame. I am writing because after years working in swimming, I built an injury database of 247 cases for Vietnamese football, and I always found it strange that swimming, the sport I came from, was almost entirely blank. That blankness is not harmless. It is a kind of statement. CONTEXT: A SWIMMING NATION CARRIED ON A FEW PAIRS OF SHOULDERS For two decades, Vietnam's regional swimming results rested on a very small group. Nguyen Thi Anh Vien carried nearly the entire swimming gold tally across consecutive SEA Games from 2026 to 2026. Nguyen Huy Hoang held the distance events, with a silver in the 1500m freestyle at the 2026 Asian Games, one of the rare continental milestones for Vietnamese swimming. Behind those two names sits a thin next generation. Tran Hung Nguyen, Pham Thanh Bao, Nguyen Thi Hong Ngoc, Hoang Quy Phuoc, Le Nguyen Paul. Each is a separate case, but their career curves share one worrying feature: injury absences were never recorded, so nobody knows how long they lasted, how severe they were, or whether they repeated. On infrastructure, the number of competition-standard 50m pools in Vietnam remains in the double digits. That matters for sports medicine in a way rarely discussed. When only a handful of pools meet the standard, athletes must travel, concentrate, and train at higher density in one location. Cumulative load stops being distributed across regions and piles into a few facilities. The selection model adds to this. The concentrated-investment approach channels resources into a small group of medal prospects. In exchange, that group must swim multiple events at every Games: a single elite swimmer may reach four to six finals in five days, plus relays. It is a load pattern no software in Vietnam is measuring. I once sat in the technical cabin of a training centre and asked about an athlete's training log. The answer was an exercise book with metres written per session. The only recorded variable was distance. No intensity, no dryland work, no sleep, no menstrual cycle data for female athletes, no post-session perceived exertion. Numbers are dry bones; context is what gives them blood. A book that says "6,000 metres" and nothing else is not data. It is a lonely figure. CORE: WHERE THE MECHANISM LIVES Swimming is a sport of repetition. A freestyle swimmer covering 6,000 metres per session, at a stroke cycle of roughly 0.8 to 1.0 seconds, performs close to 7,000 shoulder rotations per week. Histologically, that is low-load, extremely high-frequency work on the supraspinatus tendon and the subacromial space. Swimmer's shoulder, subacromial impingement, does not come from a collision. It comes from thousands of hand entries crossing the midline, thousands of scapulae that fail to rotate fully, narrowing the subacromial space week by week. Pain appears in the pull phase, when the elbow drops and the hand catches water too early. What matters is that these technical faults are entirely detectable with two camera angles. Nobody films. While V.League football clubs have had match-analysis cameras for years, many swimming centres still assess technique by a coach's eye from the poolside. The lumbar spine is the second region. Butterfly and freestyle require repeated extension of the back in rhythm with breathing. In adolescent swimmers whose spines are growing fast, this is a region under significant shear load. I have recorded back pain cases in the 13 to 15 age group where the intake file simply said "weak constitution". The knee is the third region, tied to breaststroke. The whip kick generates rotation and opening forces at the knee, loading the medial collateral ligament and medial meniscus. A single breaststroke session can include more than 1,500 kicks. No centre in Vietnam counts breaststroke kicks as a load variable. In young athletes, the growth plates at the ends of long bones are structural weak points. I once reviewed a 14-year-old with six months of shoulder pain, treated with rest and massage, until an ultrasound revealed a tendon reaction. Those six months cost the athlete the most important technical development window of a career. Every injury is a story the body is trying to tell us. The problem is that we have never sat down to listen. WHEN LOAD GOES UNMEASURED In 2026, when the pandemic froze world sport, I retreated into data. I collected results from six European leagues after football returned in June and found hamstring injuries up 41 percent year on year. From that I built the Load Decay Index: athletes with more than 45 days of inactivity faced 2.3 times the muscle injury risk on return. The model correctly predicted 14 of 17 injuries when the Premier League restarted. The pandemic season taught me that data knows how to lie, but never how to forget. I tried to apply that model to swimming and hit the first wall immediately: no input data. In football I had minutes played, sprint counts, high-intensity distance. In Vietnamese swimming I had metres per session and the name of the event. That is not enough to build a load baseline. What I need is session-RPE: perceived exertion on a 1-to-10 scale multiplied by session duration, producing a load unit. It is the simplest technique in sports medicine, used in many systems for two decades. An athlete rates the session. The coach records it. It is summed weekly and plotted monthly. In Vietnamese swimming, this barely exists. And where it does not exist, every conclusion about injury cause is a dressed-up guess. BEYOND THE 15-METRE LINE There is a technical peculiarity of swimming that I consider the biggest blind spot in Vietnamese analysis: the underwater phase. International rules allow swimmers in freestyle, butterfly and backstroke to travel up to 15 metres underwater after the start and after each turn. In short events, the underwater phase decides nearly everything. A swimmer with a strong push-off and a full 15 metres of dolphin kicking can be a second faster than a rival over 100 metres. This creates a sports medicine problem few notice. Fast underwater swimming demands extreme ankle plantarflexion range and repeated dolphin kicks at high frequency. The ankle and lower leg become primary load-bearing regions instead of the shoulder alone. In Vietnamese swimmers, many of whom have limited ankle range because they never trained it specifically as children, suddenly increasing dolphin kick volume is the shortest path to Achilles tendinopathy and shin pain. Every technical solution is therefore a transaction. To go faster in the first 15 metres, you pay at the ankle. To reduce that price, you spend years on ankle mobility. To know how much you are paying, you need tracking data. We do not have it. Turns follow the same logic. A tumble turn requires breath-holding, flexion, and rotation around the longitudinal axis. For a swimmer with lumbar issues, every turn is a compression load. A 6,000-metre session in a 25-metre pool may contain 240 turns. Nobody counts them. IN THE SAME REGION, A DIFFERENT METHOD I have observed how some regional swimming nations work. Singapore has a sports science institute tied to its national swimming programme, where training and medical data live in one system. Thailand runs periodic screening for priority athletes at national centres. Malaysia has a national sports institute handling functional testing and rehabilitation. Their shared feature is not more money. It is a place to store data and a person responsible for updating it. In Vietnam, data lives in coaches' memories, in the team doctor's phone, in messages between parents and the coaching staff. When an athlete moves, the data stays behind. When a coach moves, the data goes with him. The consequence is that every time an athlete changes centre, the diagnostic process restarts from zero. I once watched a swimmer recount his shoulder history four times to four different people over two years. The fifth time, he stopped telling it. MEDICAL STAFF PER ATHLETE There is one ratio I consider more important than any budget line: athletes per sports medicine professional. In some Vietnamese centres, one medical officer or physiotherapist covers several dozen athletes across multiple sports. At that volume, the work collapses into treatment: whoever hurts gets handled. There is no time left for prevention, screening range of motion, testing scapular strength, assessing accumulated fatigue markers. Prevention is the invisible part. Nobody awards a medal for the injury that did not happen. So in every budget review, prevention is the first item cut. I understand the pressure. I also know from my football data that the treatment cost of one severe supraspinatus tear, plus lost competition time, is many times the cost of a two-year screening programme. This is not an ethics problem. It is arithmetic. CONTRARIAN: SILENCE IS NOT HEALTH This is where I want to be blunt. When a sport does not publish injury data, our instinct is to assume there are few injuries. In sports medicine, the absence of reports almost always means the absence of a reporting system, not the absence of damage. I call it the silence index. Where the silence index is high, athletes do not disappear because they are healthy. They disappear from the pool deck before anyone records that they were ever there. In 2026, at 31, I predicted on a sports channel that Nguyen Van Quyet would miss only two weeks with a thigh injury. He actually missed two months with a semitendinosus tear. I had misread a public medical report. I once thought I was right. Van Quyet taught me that a body does not need my agreement. After that, I spent three months reviewing V.League injury footage from 2026 to 2026 and built a database of 247 cases. The biggest lesson was not about football. It was this: if I could be wrong in a sport with hundreds of hours of footage, imagine how wrong I could be in a sport with none. In swimming, there is no injury footage. No slow-motion replay of the moment something tore. Injuries arrive in silence, on a Tuesday morning, on the 4,000th stroke. That means any claim of the form "the injury was caused by faulty technique" in Vietnamese swimming, without the training plan, load history, and the athlete's own account, is a verdict without data. I have written such verdicts. I was wrong. SOMETHING HARDER TO SAY One conclusion from load data is uncomfortable. If a swimmer races five events in five days, the probability of injury and the probability of performance decline in the final event are both higher than if they raced two. This holds across most sports with tracking data. But in a system that counts medals, reducing an athlete's event load looks like weakening yourself. Here is the paradox: a strategy of stacking events to maximise short-term medal chances is also a strategy that raises the long-term risk of losing the athlete. Because we have no data, we never see that invoice. In the transfer market, injury is the interruption everyone pretends not to hear. On the pool deck, that interruption is not even allowed to speak. OUR ROLE, AS WRITERS I have to turn this on myself. For years, Vietnamese sports journalism has covered injuries as announcements: athlete X is injured, will miss Y weeks, will return at event Z. That format is convenient for writer and reader alike, but it turns an injury into a calendar entry. What gets left behind is mechanism. Nobody asks why the injury happened at that moment, in that event, after which training block. Nobody asks how the athlete felt three days before the pain began. We writers are part of the system that does not keep records. If we do not demand data, nobody is obliged to supply it. If we only report announcements, the system will only produce announcements. IN 2026, I FAILED I need to describe one of my own failures, because it shapes how I look at swimming today. At the 2026 World Cup, I spent two weeks reviewing 364 injury situations to determine whether high-intensity pressing raises injury risk. I wrote three articles with three contradictory conclusions. The data was insufficient to assert anything. My editor could barely publish it. The lesson I carried into swimming was about limits. Some questions cannot be answered by available data, and the honest way to handle them is an open article that states clearly what I do not know, rather than forcing data into a tidy conclusion. In Vietnamese swimming, almost every injury question sits in that state. I do not know the true shoulder injury rate among Vietnamese elite swimmers. I do not know the average age of onset for back pain in butterfly swimmers. I do not know how many athletes leave the sport each year because of injury. Admitting that is more useful than guessing. WHAT A LOGBOOK SHOULD CONTAIN If I could propose one thing to start next season, it would be a logbook. Every session, the athlete writes four lines: total distance; duration; perceived exertion from 1 to 10; and one line describing the shoulder, back, knee and ankle. Four lines take under a minute. Every week, multiply exertion by duration to get weekly load. Compare with the previous four weeks. When this week's load divided by the four-week average crosses a threshold, the coach adjusts volume before the body adjusts itself. Every month, record simple functional tests: internal and external shoulder rotation range, scapular strength, ankle mobility. None of these require expensive equipment. Every quarter, review the list of athletes who left the sport and why. This is the most important line of data and the one nobody wants to write, because it forces you to look at failure. None of it needs a big budget. All of it needs one accountable person and a decision that record-keeping is a mandatory part of coaching. WHO OWNS THE DATA One question will surface the moment anyone proposes a national injury registry: who owns it. This is not a technical question. It is a question of power. An athlete's injury data can improve a training programme, or evaluate a coach, or price a sponsorship deal. Those three purposes can conflict. My working principle: the athlete owns the data; the centre has access for treatment and coaching; the governing body receives anonymised data for planning. Without that principle, every collection effort will be neutralised by the reflex to hide. Ultimately, the reason injury data does not exist in many sports systems is not technical. It is that injury data always points at something somebody does not want to hear. TAKEAWAY: WHAT I WANT TO SEE I am not asking for a revolution. I am asking for one sheet of A4. A sheet stating that every priority swimming centre files a quarterly injury report: number of cases, injury region, time lost, and cause under a simple classification. No analysis needed. Just count. With three years of that, today's questions answer themselves. We will know which region dominates in which age group. We will know which months of the training cycle carry the highest risk. We will know which programmes produce durable athletes and which produce single-use athletes. And we will confirm something I believe but cannot yet prove: that most Vietnamese swimmers leave the pool not because they lacked talent, but because nobody wrote down what their body had been trying to say. A final question for those running the training centres: if someone proposed tomorrow to record every injury, what worries you more, having to write it down, or having someone else read it?