Jennifer Aniston: I am comfortable naked but my body ain't what it used to be!

Jen exercises to keep her hot bod Jennifer Aniston is comfortable in her own skin but admits her body's changed as she's got older. The actress, who's engaged to Justin Theroux, has to work hard to keep her toned figure. ‘I like to run first thing in the morning - 20 minutes to an hour is ideal,' says Jen, 44. ‘It's easy to get addicted to the euphoric feeling of having a good sweat after a run. It wakes up your body. ‘I really noticed the difference, getting older. My body ain't what it used to be! ‘I also love yoga. It helps me to feel balanced and strong inside.' The tough regime must be paying off as Jen admits she's quite happy being starkers. ‘I am comfortable [naked], yes,' the Friends star tells Saturday Magazine, 'but I don't walk around my house for that long naked!'