When Effort Metrics Mislead: From the Incheon Training Ground to Lee Kang-in's True Role

In the summer of 2026, at Sungui Arena, I sat in the third row back from the touchline, holding a notebook gone soft with sweat. Incheon United finished the K League 1 season in ninth place with 42 points, built around counter-attacking and set pieces. Across three consecutive training sessions, I counted 47 repetitions of a single corner-kick combination. No one on the coaching staff told me it was the team's signature routine. They simply repeated it. My first analysis of Incheon's "corner decoy" later reached 200,000 reads, but what I kept was not the read count. I kept a professional feeling: the most trustworthy things in football rarely sit on the scoreboard; they sit in the number of times an action is repeated until it becomes reflex. Training-ground repetition is more honest data than any post-match statistic.

Modern sports analytics has taught audiences a habit: judge a player's effort by distance covered, sprint counts, and duels contested. In the K League these metrics are published after every round and quickly become fodder for social media argument. What matters is that a player can run eleven kilometres in a match without producing a single valuable moment. He runs to cover position, runs to chase a ball that has already passed him, runs because the system forces movement rather than because he reads the game. Meanwhile, a midfielder who runs only eight kilometres, but whose every run opens space, may be the one deciding the match. That is why I always carry two notebooks: one for post-match numbers, one for what I see in training. The second is the one I trust.

When the South Korean Olympic team began its Tokyo campaign, I travelled with the squad as a reporting journalist. Lee Kang-in, born in 2026, was deployed by the coach as a free role behind the striker, far from the wide position he knew at Valencia. In the quarter-final against Mexico, South Korea lost 3-6, but I recorded Lee Kang-in making 12 chance-creating passes, the most in the tournament. Those twelve chance-creating passes appear in no distance-covered table. A central player covers less ground, touches the ball less in midfield, yet touches it more in zones that can wound. I wrote "Lee Kang-in doesn't need the wing," analysing how a central role freed his creativity, and the piece drew heavy debate. Later, the national team's head coach consulted those notes. What made me trust my argument was not the positive feedback, but having sat long enough at the training ground to watch him rehearse one-touch passes at the edge of the box, again and again, until they became reflex.

My experience covering matches taught me something different from what the data table suggests. Running a lot is not the same as running well, and a midfield that toils violently is often the sign of a system that has lost control of the ball. When a team keeps losing the ball in midfield, players are forced to run back to compensate, and that compensation itself produces pretty effort numbers. Spectators look at the scoreline. I look at how they tie their laces before the ball rolls. A well-prepared team usually walks out with laces tied tight, warm-up movements even, eyes toward the coach rather than the stands. A team in chaos tends to look down, adjust ankle tape, check phones in the dressing room.

There was a season when I was in Incheon on days the home side lost heavily more often than it won. I arrived at the training ground early, stood in the corner where the goalkeepers warmed up, and recorded every movement. The Incheon training grass still remembers every footprint I stood waiting on. During that stretch, I watched a 19-year-old goalkeeper, Park Seo-jun, cry after a session because his father was not allowed into the stadium to see him start for the first time. I held that story for six months, publishing only when he made his official debut. For six months I buried the story because no one was ready to hear it. People remember the goals. I remember the substitute applauding his teammates. And I remember the sessions where nobody scored, because that is where the system is truly assembled.

In the other direction, other metrics are also being misread, and they involve money. A club entering a public listing on the stock exchange must tell investors a compelling story. The easiest stories to sell are usually about effort, about spirit, about steadily growing numbers. Quarterly financial-reporting pressure gradually seeps into purely sporting decisions: picking players with high media indices, scheduling dense fixtures to optimise matchday revenue, favouring brand over squad depth. A contract is a farewell signed in ink. Sometimes it is also a revenue-forecast line signed in ink.

The most common blind spot among viewers is the belief that a team which runs a lot is a team with good tactics. Reality is usually the opposite. A well-organised team moves less because it is already in the right place before the ball arrives. It does not need to sprint to correct errors, because it makes few. The teams that run the most in a league are usually the ones chasing the game, and that is rarely a sign of dominance. Reading effort metrics as praise comes from a media habit, where pretty numbers make easier headlines than positional plays nobody sees. My job is to keep the drumbeat so others can march in step, and part of keeping the beat is pointing out when the drum is off.

The signal I will track in the period ahead is not in the post-match statistics table. It is in the number of times a combination is repeated on the training ground, in the order players line up for warm-ups, in who stays latest to rehearse extra one-touch passes. I write slowly. Because I believe the ball never needs to be rushed. If a team is genuinely improving, it will show on the training ground weeks before it shows on the scoreboard. And if effort numbers keep rising while results fall, then what is being measured is perhaps not quality, but panic dressed up in sweat.