The Physical Load on Vietnamese Volleyball: Re-reading 432 Injury Cases Before the New Season

A late afternoon training session in the city gymnasium. I stood in corner B of the stand, where a concrete pillar blocks nearly half the court. A 1.88m middle blocker from the Hai Phong men's volleyball team was running a repeated blocking drill: three jumps, seven seconds of rest, three more. On the eleventh repetition I started my stopwatch. On the first, his hands met the ball level with the top of the net. On the eleventh, his fingertips stopped roughly two knuckles short of the tape. The coaching staff did not stop the session. Twenty minutes later, the training plan finished exactly as written.

I wrote in my notebook: "Repeated blocking drill, third set, jump height down an estimated 9-11cm against the first set. No obvious sign of pain." Then I underlined it. Eighteen years of keeping notebooks taught me one thing: the worst injuries I have witnessed were all announced in advance by lines exactly like that one. Nobody read them.

A season with no quiet stretch

The Vietnamese volleyball calendar is now denser than most players' capacity to recover. The national championship is split into two phases, wedged between national team windows, regional club competitions and overseas training camps. A women's international, counting domestic league, continental events and friendly internationals, can play more than 60 official matches in a single calendar year. That tally excludes internal scrimmages, which are also genuine contact work.

Vietnam's women's national team won the AVC Challenge Cup in both 2026 and 2026. Those titles opened the door to world-level events and carried a consequence few people weigh: more international matches, fewer rest days, and a rehabilitation budget of time that has barely changed. The men's sides face the same arithmetic as regional cups and the national championship crowd closer together.

Cornerstones of the women's team such as Tran Thi Thanh Thuy, Nguyen Thi Bich Tuyen and Doan Thi Lam Oanh all sit in the group that grinds year-round at both club and national team level. That volume does not cause injury by itself. It simply makes every small deviation in a recovery plan many times more expensive.

The problem is not playing a lot. The problem is that the gap between matches has shrunk while jump and acceleration volume has stayed the same. Volleyball is a sport of repeated jumps: an average middle blocker performs 60-90 jumps in a five-set match, before warm-ups and supplementary work are counted. The patellar tendon and the Achilles tendon do not read the fixture list. They only record load repetitions.

Re-reading the database built during the shutdown

In 2026, when the entire competition system stopped, I sat down and reclassified the medical records of the previous five seasons. A total of 432 cases, coded by position, by the point in the match when they occurred, by court surface and by the actual number of rest days taken before returning. That database remains the only tool I trust when assessing risk for a specific player.

Four injury groups account for most cases. The first is shoulder and wrist among outside hitters, a product of peak spiking volume. The second is knee, concentrated among middle blockers and opposites, tied to blocking jumps and lateral movement. The third is ankle, occurring mainly on mistimed landings or when a player steps on a teammate's foot near the centre of the net. The fourth is lower back and erector spinae, appearing most often in players past 27 with a history of sudden load increases.

The distribution over time is what stands out. Nearly 61 per cent of cases occurred from the third set onwards, or in the final twenty minutes of a training session. This is the zone where technical metrics have not yet visibly collapsed but movement control has already degraded. A player in that state still spikes through the net, still blocks the ball, but the joint-protection mechanism has weakened. Injuries happen there, not in the third minute.

I always tell younger colleagues: Data does not lie, but the people supplying the data do. A medical report reading "stable" may be functionally accurate while saying nothing about load tolerance. A line reading "fit to play" does not mean the player can absorb four high-intensity sets inside forty-eight hours.

The signals that never make the minutes

Three markers I track at every session never appear in official reports.

The first marker is landing rhythm. A healthy player lands on the forefoot, knees flexing evenly, centre of gravity low. Under fatigue, the tendency shifts to landing flat-footed, knees stiff, centre of gravity rising. This change appears before the player feels pain, usually more than two weeks earlier.

The next marker is the rest interval between two jumps in a repeated drill. In a normal state the interval stays stable. Once the muscle is fatigued, the player automatically stretches it by half a second to a second without noticing. A coach reading the training plan sees the drill completed. Someone reading the tendon sees an entirely different signal.

The remaining marker is sound. The landing of a fresh player sounds clean. Under fatigue, the foot hitting the floor sounds heavier and duller, because force is no longer dispersed through the knee-hip chain but driven down into the heel. I have used this method for eighteen years and still have not found a device that replaces it.

New technology and the old notebook

In the summer of 2026 I received GPS tracking data supplied by the organisers of an international event. The table was long, elegant, with an efficiency index computed by a proprietary algorithm. It took me nearly two months to cross-check it against the paper medical records of domestic teams. My conclusion: the new index is credible for trends but insufficient for a decision about one individual. It measures distance, it measures jump count, but it does not measure what a patellar tendon feels like at four in the afternoon.

The database I built during the shutdown is still recording what they would rather not publish. The difference between an injury handled correctly and one pushed too fast usually does not lie in the treatment protocol. It lies in whether anyone is willing to say "no" to a fixture list.

The team doctor says three weeks. I count the days backwards — the difference lies in the number of days, not in the promise.

An injury is a fact. An injury announcement is a document that requires verification.

My files contain cases announced as a "mild strain" where the actual layoff stretched to 34 days. They also contain cases announced as a "serious injury" where the player returned after 12 days, played the full match and did not relapse. Those two examples say something more important than any diagnosis: medical statements serve communication purposes, while rest periods serve treatment purposes. The two do not always coincide.

The contrarian angle: heroism and its price

A deep-rooted belief persists in Vietnamese volleyball: a good player is one who plays through pain. The image of an outside hitter with a strapped shoulder, taking painkillers before stepping on court, is received by the media as a symbol of competitive spirit. I understand the emotion. But it produces a paradox: the more a player is praised, the harder it becomes to withdraw.

There is another way to read the decision to rest a player. Rotation is not a sign of weakness. For a team playing 60 matches a year, holding a cornerstone out of four group-stage matches so she is fully available for the semi-final is an optimisation problem, not a concession. The right question is not whether this player is in pain, but how large the accumulated risk is over the next six weeks.

Commercial pressure makes that arithmetic harder. A star on the bench means emptier stands, sponsorship contracts missing their leading face, and previously promoted fixtures losing their focal point. Nobody wants to be the person who signs off on resting a star. That is why such decisions tend to be postponed until the body answers on its own.

A muscle tear never appears overnight — unless someone wants it to. And when it appears, people call it an accident. I have watched enough match footage to know that most of those accidents had a schedule.

What to watch in the new season

At current density, I expect soft-tissue injuries to the shoulder and ankle to keep the largest share in the first half of the season. The sharpest risk spike falls in the transition between the two phases of the national championship, when a player finishing a national team camp must return to club competition almost immediately. The variable to watch is actual rest days, not announced rest days.

At 60, I still open my notebook before every match — an old habit, but the data is always new. What I want the younger generation of reporters to carry is not scepticism but the habit of verification: go back to the medical source, cross-check the footage, count the days, and write down the timeline. Vietnamese volleyball is rising on a steadily better physical foundation. Whether that foundation survives a four-year cycle depends on whether anyone dares to slow down at the right moment.