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Rooney Mara talked sports and exercise in the January 2012 issue of Allure magazine. She says she decided to take up boxing because in her 2011 film, "Girl with the Dragon Tattoo," her character Lisbeth is a boxer.
'I've never done group sports, but I've always sort of been active,' Mara told the magazine. 'I do a lot of Pilates and the barre method, or cardio barre, yoga, or just running. I just wanted to do the kickboxing because [Lisbeth Salander's] a boxer. And then it was a good way to stay sort of slim and in shape.'
(Pictured: A photo of running shoes from 2005.)