The 35-year-old claims her body makes different requests to what it used to when she was younger, reported Contactmusic.
"It's changing as I get older. When you're younger it feels like you're unbreakable. But as I'm ageing - which I'm doing happily - I'm finding that my body is starting to make different requests, which is want I want to listen to and respect," she said.
The 'Star Trek' actress also said she can't handle late night partying any more and has to head home early to recuperate.