Cameron Diaz Works Hard to Bulk up

And Diaz can't imagine life without her daily keep-fit routines at the gym.

She tells Harper's Bazaar, "Exercise for me is like eating, sleeping, and breathing. I'm consistent, and when I'm not consistent, it shows up on my body. I get really skinny, and I know it might sound like, 'Well, good for you.' But the body that people talk about is not me trying to stay slim, it's the one where I work hard to keep weight on me. Your body definitely does change."