Kate Beckinsale's "Punishing" Fitness and Diet Regimen

Kate Beckinsale works hard for her bod. The 43-year-old actress appears on the cover of Shape magazine's January/February 2017 issue, looking more toned than ever in a barely-there, colorblock bikini. "I work out hard with Gunnar five or six times a week," Beckinsale revealed, adding, "I do circuit training interspersed with brutal cardio, such as crazy things on a nonmotorized treadmill. But the thing I like about circuit training is that you're never doing one thing for very long. I have a lot of internal energy, and intense exercise helps me channel that energy.