Brooklyn Decker refused to do yoga with Jennifer Aniston as she felt ''intimidated'' by her perfect body.

The 25-year-old model starred alongside the actress in the 2011 comedy 'Just Go With It' and felt awestruck seeing her in a bikini.

Asked who she would want if she could choose anyone as a body double, she told Women's Health magazine: ''It's got to be Jennifer.

''She's so active and had to be in a bikini for 'Just Go With It' - she just had this glow about her. I was a bit awestruck! I was invited to do yoga with her on set but they had so many good yogis I was intimidated and chickened out.''

While her own figure is the envy of many women, Brooklyn credits her husband, tennis ace Andy Roddick, for helping her feel confident in herself.

She said: ''The biggest thing for me about being with Andy is that athletes in general tend to appreciate different things about women's bodies.''

Despite being keen to stay healthy, the 'What to Expect When You're Expecting' star claims that being on film sets makes it virtually impossible not to indulge when there are calorific treats available 24 hours a day.

She said: ''Imagine the best junk food you've ever seen, available 24 hours a day - that's what sets are like. There are sweets and doughnuts in front of me all the time. My rule of thumb is that if I'm working, I eat healthily.

''I have such a sweet tooth that I can't let myself indulge because work is where I spend most of my time, so when I'm at work, no bad food.''