Kate Beckinsale is on the cover of the January 2017 issue of Shape, and in her interview, she describes how she pushes her body to the limit with difficult circuit training workouts. She told the magazine, “I find balance by doing a workout that makes me pour sweat. I never was that girl before, but I am now.”

You can see the results of all that training in her new movie, Blood Wars, the fifth installment in the Underworld franchise, in theaters starting January 6. In the meantime, here’s a peek behind the scenes of Beckinsale’s Shape photo shoot. She describes herself as “awkwardly standing about in my underpants,” but if she felt awkward, it doesn’t show. The 43-year-old actress looks flawless.

And here’s the Blood Wars trailer, which features an even fiercer-looking Beckinsale: