(Cover) - EN Showbiz - Hayley Atwell "threw up" after her first training session for upcoming blockbuster Captain America: The First Avenger.

The actress, who plays the superhero's love interest Peggy Carter, revealed the intense fitness regime she was put through to achieve the best possible physical condition.

Personal trainer Simon Waterson, who also prepared Chris Evans for his role as Captain America, made the 29-year-old brunette work very hard.

"He really put me through it," she told Total Film magazine. "Various types of detox, hard running, endless lunges I threw up after the first day!"

But the intense workouts helped Hayley to develop her character, too.

She explained that Peggy has to prove herself in a world dominated by men and needs to be tough to be taken seriously.

"Peggy's succeeding in a male-dominated world. She's slightly resentful, but feels she has a lot to prove," she said. "The training was all about trying to push myself to be in the best physical condition ever. (C) Cover Media