To say David de Gea was a little on the skinny side when he joined the Red Devils back in the summer of 2011 would be a bit of an understatement.
Many suspected that his slight frame would be a problem in the rough and tumble of the Premier League, and for a time opposing teams would target his lack of physicality.
However, in the three and a half years since his arrival, the change in his physical stature has been immense. In fact, it has been so great that the Spaniard has compared his body transformation to that of American superhero Captain America, who went from a scrawny little man to a muscle-clad super-soldier.
When asked about his gym routine in an interview with ManUtd.com, De Gea said: "I was like Captain America in one year (laughs)!
"No, I still do the programme, although not as much as before.
"It is more of a reduced programme now but certainly I did a lot of gym work at the start and it did have a big impact."
The 24-year-old has been in the best form of his life for United this season and has almost single-handedly won them numerous matches.
However, de Gea clearly doesn't want to rest on his laurels, as he went on to say that he can still improve in every area, and that he hopes there will be 'more to come' from his performances.
He added: "No matter how excellent your form is, you can always get better and there are always aspects of your game that you can improve.
"No matter how well people think you are playing, or how well you think you are playing yourself, it is always a case of working on every facet of your game. There is hopefully more to come."
De Gea has been hailed by many analysts of the English game this season and still so young, he will surely continue his fine development and go on to stake his claim as the world's best goalkeeper.