Chris Evans had a strict diet of "lean, dry, simple food that provides protein" including "bland chicken" to develop the hunky image of Captain America.
Evans is back in the title role of the forthcoming film 'Captain America: The Winter Soldier' and was forced to do "weight training" and eat protein foods to build the image needed to depict his character.
Speaking to Glamour magazine, the actor said: "I'm a skinny guy naturally. My body wants to be about 170-180lbs, so to get it to 200lbs, I have to eat a lot. It's not so much what you're eating, it's the quantity.
"Aside form the weight training, which is brutal - although when you walk out of the gym you feel great - it's inbetween the workout that's tough, just eating, eating, eating. It sounds pleasant, but it's not pizza and doughnuts, it's just bland chicken.
"Very lean, dry, simple food that provides protein. You always feel bloated and uncomfortable."
Evans reprised the role he first took on in 2011's 'Captain America: The First Avenger' for 'The Avengers' and 'Thor: The Dark World' before taking on the character again for 2014's film.
He will be returning to the role later this year as filming on Avengers: Age of Ultron will begin filming.
Captain America: The Winter Soldier is released 26th March.
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