Before Blake Lively was pregnant with her second child, she was getting in fighting shape
for her shark thriller The Shallows
, which started filming just eight months after she gave birth to daughter James.
In addition to rigorous workouts, the 28-year-old actress also cut some things out of her diet. "I did no gluten and no soy," she revealed on Kylie Sandilands and Jackie 'O' Henderson's Australian radio show
"Once you remove soy, you realize you're eating no processed foods. So
that's basically what I did. No processed foods and then working out."
Lively admitted that staying away from such foods was no easy feat. "[It] seems like, 'Oh, that's really easy to cut that out,' but then you realize, there's soy in everything," she exclaimed. "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."
While it was tough to stick to, Ryan Reynolds' wife
did not feel hungry. "I was still able to have sugar and all of those things. It's all in moderation," she continued. "You just have a balance of protein, carbs, and vegetables. And it wasn't the worst. Like, I was eating rice and sushi."
Lively did, however, get tempted when around craft services of The Shallows. "That was the hardest part," she confessed. "They were making these fresh muffins every morning -- those jacka**es. They smelled so good!"
Lively also told ET
that her husband helped her take on such a physical role. "[For this film] he said, 'Be prepared, this movie is a physical challenge, it is an athletic event,'" Lively said, noting that Reynolds told her that prepping for the part would be a lot "like training for a marathon."
"Being in waves like that, swimming like that, doing such long takes like that all the time -- I became so much stronger and more fit by the end of production. I was working out 13 hours a day because shooting was working out," the actress dished. "It was neat to be able to do that, and it was neat to have that challenge after having a baby, because you think your body is so different -- you think no matter what, it's never [going to be] totally be the same."