Blake Lively in The Shallows

How to get a body like Blake

Blake Lively began filming her bikini-clad surfer role in the shark thriller The Shallows only eight months after giving birth to daughter James. And while she and her trainer have spoken previously about her rigorous diet and training routine, Lively still has secrets to spill.

In a telephone interview Tuesday with Australian radio hosts Kyle and Jackie 'O' Henderson, Lively admitted that her intense diet included no soy: 'I did no gluten and no soy’, she said. ‘Once you remove soy, you realise you're eating no processed foods. So that's basically what I did. No processed foods and then working out’.

Lively explained that removing soy was the most challenging part of the process: ‘[It] seems like, 'Oh, that's really easy to cut that out,' but then you realise, there's soy in everything’, she said. ‘Like, everything you eat, there is soy in it. Even if it's healthy, Whole Foods-organic stuff, there's always soy in it’. ‘Just try no soy and no gluten and watch how hard that is’, she added.

But just because Lively was steering clear of processed foods didn't mean she was going hungry. Despite having a rigorous diet, she found herself eating well: ‘I was still able to have sugar and all of those things. It's all in moderation. You just have a balance of protein, carbs, and vegetables. And it wasn't the worst. Like, I was eating rice and sushi’.

Blake Lively in The Shallows

There was one downside though – not being able to enjoy the food the cast and crew were enjoying on the Shallows set. ‘That was the hardest part’, Lively admitted. ‘They were making these fresh muffins every morning – those jackasses. They smelled so good!’

Previously, Lively's trainer, Don Saladino, told PEOPLE how he got Lively in shape for the beachside shoot in just two months. To supplement her almost daily workouts, Lively was eating four small meals a day – which she planned with the consultation of a nutritionist. ‘We made sure that her meals were well-balanced’, he said. ‘She had a protein, a vegetable and a slow-burning carb. We tried to give her enough so that she wasn’t stuffed, but she was comfortable’.

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Article courtesy of Dave Quinn at