'The Rum Diary' actress - who is engaged to Johnny Depp - hates working out indoors to keep her enviable figure in shape, preferring to spend her time out in nature.
She told E! News: "I'm active. That's the key. I'm not really one to go sit in a gym. I get claustrophobic, I guess. I'm lucky though. I live in Los Angeles, so I have a lot of time to be outside and be active. That's what I do."
One of the other ways Amber may use to keep in shape is dancing - although she is "dying" to live it up at a country night held at Los Angeles gay bar Oil Can Harry's, but hasn't made it yet.
She added: "I'm dying to go. I try to make plans with my gays to go and every week something happens and I can't go."
Amber, 27, was also recently in Paris filming '3 Days to Kill', where she picked up some of the local language.
She explained: "I can order some wine. The important stuff."