V.League and the Fitness Equation: When Pressing Becomes a Double-Edged Sword

In the second half of the match between Cong An Ha Noi and Thep Xanh Nam Dinh, from the 70th minute onward, the visitors' midfield all but disintegrated. Three misplaced passes in four minutes, a loss of possession in the middle of the park, then a counterattack that forced the goalkeeper into a diving save. I sat in the stand at Hang Day Stadium, notebook open, recording every phase. The friend beside me — a former coach — shook his head: "They've run out of battery."

That was the moment I decided to spend an entire week answering a question the league table never raises: what is really eroding V.League teams in the final 20 minutes?

Back home, I reopened my tracking sheet. Thep Xanh Nam Dinh's PPDA in their last three rounds read 8.7 — 9.9 — 12.4. The curve climbs steadily, and nothing about it is random. Pressing intensity is rising, but its price is paid by the legs of men who never appear on the scoresheet.

The context needs to be placed correctly. In 2026, Ha Noi FC won V.League with an average PPDA of 9.8 — the lowest in the division, meaning they were the most aggressive pressing side. That year, I spent four months rewatching all 26 of their matches, logging every duel in the opponent's final third, then wrote my first analytical piece. Colleagues dismissed me as "academic, emotionless." But by year's end, a wave of clubs began copying that style. A tactical model had spread across the league.

Eight seasons later, that model has become the standard. The problem lies here: when everyone presses, the advantage no longer lies in the act of pressing, but in the capacity to endure it. This is the point most commentary skips. People count goals, count points, count cards. Very few count the metres a midfielder must run in the second half, when his legs have grown heavy as lead.

This year's regular season has produced a paradox. Goals scored in the final 15 minutes have risen sharply, yet teams' passing accuracy over the same window has fallen. In other words: more balls hit the net, but the quality of combination play gets worse. Those two figures do not contradict each other — they tell the same story of systemic exhaustion.

To verify, I selected the ten highest-scoring matches since the start of the season and broke them down by phase. The result made me check it twice.

First, the density of goals shifts markedly toward the end. Across the full sample, roughly 38% of goals are scored after the 75th minute. That is significantly higher than in the 2026-2026 period, when teams still played at a slower tempo. Second, chance quality in the first half is markedly superior. Total first-half xG across the sample averaged 1.3 goals per match, while the second half averaged only 0.9. That is to say: teams create better chances while fresh, but score more goals once tired. This can only be explained by one variable: defensive error increases with time.

This is where the match's colour changes. A tired back line can no longer hold its shape. The gap between the two centre-backs widens. The holding midfielder can no longer cover in time. And a single lapse of concentration puts the ball in the net. The goal arrives not because the attack is better, but because the defence has come apart.

I witnessed this directly. In the match between Viettel and Hoang Anh Gia Lai, the visitors' defensive organisation kept a clean sheet for the first 70 minutes. Then in the final 20, they conceded twice — both stemming from losses of possession just outside their own box, the consequence of no longer having the energy to escape the press. On the scoreboard, people saw a comeback. In my notebook, it was a physical collapse encoded as goals.

Based on my experience tracking matches across many seasons, I have noticed a striking regularity: teams that concede in the second half are usually not those weak in defensive organisation, but those no longer able to execute that organisation. The distinction matters, because it determines whether a club should buy another defender or another ball-retaining midfielder.

And this is where the story turns to the transfer market.

If fitness is V.League's new currency, then clubs are spending on it in very different ways. I tracked the transfer activity of the top eight clubs and found a clear pattern: the strongest pressing sides are the ones buying to a physical profile, not a technical one.

The transfer market is not a game of sentiment, it is a game of redrawn maps. And this season's map is drawn with metrics such as distance covered, number of sprints, and between-match recovery capacity. A midfielder with elegant passing but only 9 km per match is losing value. A midfielder covering 11.5 km per match at high intensity is gaining value, even with a rougher touch.

I call this the quiet trade: technique exchanged for stamina. In the past, V.League clubs sought foreign players capable of creating a moment — one touch, one shot. Now they seek running machines that never tire. The recruitment criterion has shifted, and it happens more quietly than any blockbuster transfer.

A concrete example. When a title-chasing club signed a foreign central midfielder mid-season, the deal drew little praise because the player had never scored ten goals in a season in any league. But my data showed he sat in the top 5% for recovery metrics — meaning he could play three matches in seven days without dropping intensity. That was the real reason for the deal. Not goals, but the ability to run three games a week.

Here, the five-substitution rule plays a central role. I have written about it many times, and my view has not changed: the five-substitution right deepens the squad, but it also turns the final 20 minutes into a war of attrition. It does not save teams from exhaustion — it merely extends the battle to the final minute.

The logic is simple. With five substitutions, a coach can introduce fresh players at the 60th, 70th, 80th minute. But the opponent does the same. The result is that in the second half, the game's tempo does not drop but rises, because both sides have reserve energy to burn. The match does not slow — it accelerates at the very stage when the legs of the key men are gone.

The paradox is this: teams with good squad depth benefit most, but also face the greatest physical pressure, because they must sustain high intensity for 90 minutes to exploit their advantage. A club without five quality players on the bench will be left behind in the final 20. And in V.League, the number of teams with genuine depth can be counted on one hand.

There is a secondary consequence few discuss, related to officiating. When fitness declines, the number of fouls rises, especially late challenges and imprecise duels. This drives up VAR interventions late in matches. And this is where I return to a long-held belief: VAR does not reduce controversy; it merely moves it from the pitch to the review room and the grey zones of the law. A challenge in the 88th minute, when a player is exhausted, often sits on a line that even technology cannot draw cleanly.

I have reviewed many such situations. The referee makes a call, VAR intervenes, then the referee runs to the pitchside monitor. Three minutes later, he upholds or overturns the decision. But whatever the outcome, the controversy remains intact — it merely moves from the stands to the forums, from jeers to comment threads. Technology does not erase the grey zone; it enlarges it on a big screen.

This connects directly to the fitness story. An exhausted player makes a decision half a second slower, and that half-second is enough to turn a legal duel into a foul. The referee cannot see that on a monitor — he only sees the final outcome. So the debate about refereeing, in the end, is also a debate about fitness in disguise.

This is where I must challenge myself. For years, I believed in pressing data as an article of faith. But data does not tell me what happens inside a player's head when he knows he must run 15 more minutes with empty legs. A player expresses emotion; it takes ten seasons to form a system. I can measure distance covered, but I cannot measure the fear in a duel in the 88th minute.

And here is the biggest blind spot of the pressing model: it assumes every player can recover equally. Reality disagrees. A 22-year-old and a 32-year-old run the same distance, but the price they pay is entirely different. My dataset cannot distinguish between them — unless I deliberately split the sample by age, and most clubs do not.

What would change my mind? If a team pressed at high intensity all season without an injury crisis, and still held form in the run-in, I would have to revisit my entire analytical framework. Until then, I hold that the physical price is real, and it is being paid quietly.

Here a temptation appears that I want to flag. When people see late-match goals rise, they easily conclude that V.League is more exciting, or that teams attack better. That is a causal error. Rising late goals do not prove attacking quality has improved — they prove defensive quality has fallen, and the cause lies in fitness, not in attacking tactics.

This is a textbook case of correlation not equalling causation. Two phenomena — more goals and more minutes played — appear together, but they do not drive each other. They are both driven by a third variable: the decline in organised defending late in matches. Confusing correlation with causation is the most common error in football analysis, and it frequently leads to wrong conclusions about the transfer market.

The consequence of this error is concrete. A club believes it needs another striker to score more, when the real problem lies in ball retention and defending from the front. It pours money into the wrong position, then wonders why the goals still come in the 85th minute. The remedy does not lie in the attack — it lies in rotation capacity and fitness management.

The crowd may leave the stand, but the numbers stay seated in their chairs. And the numbers are telling us that this season's real battle is not fought in the opponent's box, but in the recovery room.

There is another counterintuitive angle I want to put on the table. People often assume squad depth is an absolute advantage. But when I look at injury data for the teams with the best depth in the league, I see a worrying pattern: they do not suffer fewer injuries, but their injuries cluster among key players. The reason is simple — when you have many backup options, you tend to push your key men harder, because you believe you can substitute them at any moment. But that belief makes them play the most important minutes, at the highest intensity.

So squad depth, in the end, is a double-edged sword. It lets you rotate, but it also creates the temptation not to rotate. And in V.League, where the schedule is dense and the breaks are short, that temptation often leads to irreversible consequences in the decisive phase of the season.

Looking ahead to the coming rounds, I am betting on a signal few notice: teams with dense schedules will begin rotating more, not because they want to, but because they must. Those who do not rotate will pay with injuries. And the clubs that understood this earliest — those that quietly bought to a physical profile from the start of the season — will be the ones still standing in the run-in.

Every prophecy begins with a table nobody bothers to read. That table sits in every club's medical room, and it is recording what the league table will only reveal at season's end. By then, people will blame the referee, VAR, an unlucky moment in the 90th minute. But those who took the trouble to sit with the data from the start already knew the answer. V.League does not lack numbers; it lacks people who know how to turn numbers into a window frame.