The return of Kai Havertz to Arsenal training has quickly become one of the most talked-about stories among supporters, not only because of his long-awaited comeback from injury, but also due to noticeable changes in his physical appearance.
As the festive period approaches, Arsenal find themselves in a highly encouraging position. The Gunners sit at the top of both the Premier League and their UEFA Champions League group, creating a wave of optimism around the club. While the season still has a long way to run, morale has been boosted further by positive updates from the medical department.
One of the most significant developments has been the sight of Havertz rejoining first-team training, ending a lengthy spell on the sidelines that had kept him out of the spotlight for much of the past year.
A Long Road Back from Injury
Havertz’s contribution during the current campaign has been extremely limited. The Germany international has made just one appearance this season, having been sidelined since August with a knee injury. That setback followed another frustrating period in his career, as he also missed the second half of the 2024/25 season due to a hamstring problem.
In fact, the last time Havertz started a Premier League match under Mikel Arteta was almost a year ago. That appearance came in Arsenal’s emphatic 5–1 victory over Manchester City on February 2, 2025—a reminder of the level he is capable of reaching when fully fit.
Given his extended absence, it is no surprise that his return to training has drawn intense scrutiny from fans eager to see how he will reintegrate into a team that has continued to evolve in his absence.
Physical Changes Spark Online Debate
Photos and behind-the-scenes training footage shared by Arsenal on social media immediately ignited discussion. While supporters were pleased to see Havertz back on the grass, many quickly shifted their focus to his physique.
Several fans noted that Havertz appeared different compared to his look during last summer’s pre-season. At that time, the former Chelsea player surprised many by returning with a noticeably bulkier frame after undergoing an intensive muscle-building programme during his rehabilitation from a hamstring injury.
This time, however, the reaction was mixed. Some supporters felt that Havertz appeared leaner, suggesting he may have lost some of the muscle mass he had previously built.
“He looks like he’s lost all the muscle he had in pre-season,” one fan commented. Others echoed similar sentiments, with replies such as, “He looks like the old Havertz again,” and, “I thought I was the only one who noticed that.”
Not all reactions were negative. Some fans played down the concerns, arguing that the current version of Havertz still looks physically stronger than he did earlier in his Arsenal career. “I don’t mind it. He still looks bigger than he did in the 2023/24 season,” one supporter wrote.
Theories Behind the Transformation
As the debate gathered momentum, fans began offering theories to explain the apparent changes. One popular suggestion was that the adjustment could be deliberate and medically driven.
“Maybe he realised his body and knee joints don’t respond well to carrying extra muscle weight, which could increase the risk of injury,” suggested one Arsenal supporter. Given Havertz’s recent history of muscular and knee issues, the theory resonated with others who prioritised long-term fitness over short-term physical gains.
However, there were also voices expressing concern. “He looks like he’s lost all the muscle he worked so hard to build. It’s similar to when he first arrived here, and that’s not ideal,” another fan commented, reflecting lingering doubts about his physical robustness in the Premier League.
Arteta’s Previous Explanation
Earlier this year, Arteta addressed Havertz’s physical transformation and made it clear that the changes were neither accidental nor rushed. According to the Arsenal manager, the decision to increase Havertz’s muscle mass during the previous summer was part of a carefully planned strategy.
“There has been a big transformation in his body,” Arteta explained at the time. “The last three years of his career were so intense that he never had the time to do this. Last summer was an opportunity, and he really wanted to take it.”
Arteta went on to highlight the remarkable results Havertz achieved during that period. “The coaching staff explained the potential his physical profile had to reach another level. He embraced it fully. You could see his presence straight away. He broke every metric we have had in the gym over the last ten years—everything. Strength, acceleration, muscle mass, certain body capacity improvements, agility—he was unbelievable.”
Those comments underline how closely Arsenal have monitored Havertz’s physical development, reinforcing the idea that any current changes are likely part of a broader, carefully managed recovery process.
What Comes Next for Havertz?
With Havertz now back in full training, attention will gradually shift away from his physique and toward his performances on the pitch. Arsenal’s medical and performance staff are expected to manage his workload cautiously, ensuring he regains match sharpness without risking another setback.
For Arteta, Havertz’s return offers tactical flexibility at a crucial stage of the season. Whether deployed as a forward, a midfielder, or in a hybrid role, his intelligence and versatility remain valuable assets.
As Arsenal push forward in both domestic and European competitions, supporters will be watching closely—not just to see Havertz back in action, but to assess how his body adapts over the coming months. If managed correctly, his return could provide a timely boost for a team with serious ambitions, regardless of how his physique ultimately evolves.
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