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Science and Data Change Soccer’s Definition of Old


LONDON — The precise location of the brink has all the time been contested. At Manchester United, for a time, it lurked close enough to 30 for that to function a natural watershed. Once players hit their 30s, Alex Ferguson, the club’s manager on the time, tended to grant them an additional day’s rest after a game, within the hope that the break might soothe their creaking bodies.

Arsenal’s Arsène Wenger was somewhat more nuanced. He had a formula. Once midfielders and forwards reached the grand old age of 32, he was prepared to supply them only one-year contract extensions. “That’s the rule here,” he once said. “After 32, you go from 12 months to 12 months.” He made an exception for central defenders; they may sign contracts that carried them to age 34.

But while the precise cutoff has all the time been subjective, the broad and longstanding consensus inside soccer is that it lies in there somewhere. In some unspecified time in the future early of their 30s, players cross the boundary that distinguishes summer from fall, present from past. And as soon as they do, they’ll officially be considered old.

That delineation has long informed each the player-recruitment and the player-retention strategies of teams across Europe. A overwhelming majority of clubs have, as a rule, adhered for years to a straightforward principle: buy young and sell old.

Tottenham’s acquisition last month of the 33-year-old Croatia midfielder Ivan Perisic, for instance, was the primary time that the club has signed an outfield player in his 30s since 2017. Liverpool has not done so since 2016. Manchester City has not paid a fee for an outfield player over age 30 for nearly a decade. Goalkeepers, widely held to boast greater longevity, are the one players granted an exception.

As an alternative, players approaching the twilight of their careers are generally seen as burdens to be shifted. This summer has been a living proof: Bayern Munich has managed to alienate the almost-34-year-old Robert Lewandowski by (unsuccessfully) attempting to anoint Erling Haaland, a decade his junior, as his heir.

Liverpool, meanwhile, has began the work of breaking up its vaunted attacking trident by replacing the 30-year-old Sadio Mané with Luis Díaz, 25, and adding the 23-year-old Darwin Nuñez to succeed Roberto Firmino, who turns 31 in October. Because it seeks to overhaul its squad, Manchester United released a collection of players — Nemanja Matic, Juan Mata and Edínson Cavani amongst them — right into a market already saturated with veterans, including Gareth Bale and Ángel Di María.

The reasoning behind this, in fact, is easy. “The demands of the sport are changing,” said Robin Thorpe, a performance scientist who spent a decade at Manchester United and now works with the Red Bull network of teams. “There’s rather more emphasis on high-intensity sprinting, acceleration, deceleration.” Younger players are deemed higher equipped to handle that load than their elders.

Just as essential, though, recruiting younger players guarantees “more return on investment if you’re seeking to move them on,” based on Tony Strudwick, a former colleague of Thorpe’s at United who also has worked at Arsenal. Clubs can earn back their outlay — maybe even make a profit — on a player acquired in his early 20s. Those a decade or so older are, in a strictly economic sense, seen as a rapidly depreciating asset.

Those two ideas are, in fact, related, and so it is important that at the very least certainly one of them could also be rooted in outdated logic.

In response to data from the consultancy firm Twenty First Group, players over age 32 are consistently playing more minutes within the Champions League every 12 months. Last season, players over age 34 — practically ancient, by soccer’s traditional pondering — accounted for more minutes in Europe’s big five leagues than in any previous season for which data was available.

More significantly, that has not been at any notable cost to their performance.

“Age has its pros and cons,” the previous Barcelona right back Dani Alves, now 39 and determined to proceed his profession, told The Guardian this month. “I even have an experience today that I didn’t have 20 years ago. When there’s an enormous game, 20-year-olds get nervous and fearful. I don’t.”

Twenty First Group’s data bears Alves out. Though players of their 20s do press greater than those of their 30s do — 14.5 pressing actions per 90 minutes, versus 12.8 — that reduction is offset in other ways.

In each the Champions League and Europe’s major domestic competitions, older players win more aerial duels, complete more dribbles, pass with greater accuracy — in the event that they are central midfielders — and rating more goals. Greater than twice as many players over age 30 now rank in Twenty First Group’s modeling of the most effective 150 players on the planet than appeared in the identical list a decade ago.

The information suggests, very clearly, that 30 isn’t as old because it was once.

From a sports-science perspective, that’s hardly surprising. The concept of 30 as an immutable aging threshold predates soccer’s interest in conditioning: The present generation of players of their 30s, Strudwick identified, would be the first to “have been exposed to hard-core sports science from the beginning of their careers.”

There isn’t any reason to assume they’d age at the identical rate, or the identical time, as their forebears. “Have a look at the condition that players are in once they retire,” Strudwick said. “They haven’t let their bodies go. They could must be pushed somewhat less in preseason, and their recovery may take longer, but from a physical and a performance perspective, there isn’t any reason they’ll’t add value into their late 30s.”

That longevity can only be increased, Thorpe said, by improvements in nutrition and recovery techniques.

When he was at Manchester United, he said, “the rule of thumb was all the time that players over the age of 30 got a second day’s rest after games. It felt intuitively like the suitable thing to do.” The reality, though, was that it wasn’t all the time the older players who needed the break.

“After we researched it, after we checked out the info,” Thorpe said, “we found that it was far more individual. A few of the older players could train, and a number of the younger players needed more rest.”

As those forms of insights have turn into more embedded in the game, he argued, it follows that “more players should give you the chance to do more in a while of their careers.” Luka Modric may need been joking when he told an interviewer, before the Champions League final in May, that he intended to play on “until 50, like that Japanese guy, [Kazuyoshi] Miura,” nevertheless it isn’t any longer quite as absurd because it may need once sounded.

That the clubs don’t appear to have noticed — that players over age 30, with rare exceptions, still appear to be considered a burden somewhat than a blessing — is, so far as Strudwick can see, now almost exclusively an economic issue.

“A player’s life cycle is an inverted U shape,” he said. “But salary expectations are linear.”

A more scientific approach may need flattened the downward curve of a player’s performance graph, and even delayed its onset, nevertheless it cannot eliminate it completely. In some unspecified time in the future a player will enter what Strudwick called the “roll-down phase.” The one thing that no club wants — that no club can afford — is to be paying a player a premium salary when that moment arrives. That’s what motivates clubs, still, to imagine that a threshold arrives at 30: not what players can contribute, but what they cost.

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