Kate Beckinsale in Bathing Suit Says "Happy International Cat Day"

Kate Beckinsale is celebrating International Cat Day in her bathing suit! The eccentric actress shows off her fit-at-49 figure in a swimsuit as she strikes a yoga pose with her beloved cat on her shoulder and lounges on a raft in her swimsuit with her kitty right next to her in another. How does she manage to look half her age? Read on to see 5 of Kate Beckinsale's top tips for staying in shape and the photos that prove they work—and to get beach-ready yourself, don't miss these essential 30 Best-Ever Celebrity Bathing Suit Photos!

As Kate demonstrates in the first photo, she loves yoga. She often does yoga workouts recorded by Jessica James and Mandy Ingber. "I haven't been injured while doing an action movie, and I think it's partially from practicing yoga," she told Women's Health. "When you lift weights, your muscles get stronger and bigger. When you do yoga, your brain cells develop new connections, and changes occur in brain struc­ture as well as function, resulting in improved cog­nitive skills, such as learning and memory. Yoga strengthens parts of the brain that play a key role in memory, attention, awareness, thought, and language. Think of it as weightlifting for the brain," says Harvard Health.

While Kate ditched meat from her diet for many years, she started eating fish and chicken at the suggestion of her trainer and it was a game-changer. "I was a vegetarian for a really long time because I am incredibly squeamish about meat," she told Shape. "But when I was filming Pearl Harbor, I didn't have enough energy, and the trainer I was working with at the time said 'You've got to start eating chicken and fish.' So I did, and that helped me." Overall she maintains a clean diet, trying to avoid sugar and refined carbohydrates as they make her feel "very sluggish" she told Delish. She tries to eat protein and vegetables, which "suit my body very nicely," she said. 

Kate is a beast in the gym. She works out with Brad Siskind of Gunnar Peterson's gym, who recently dished about their sessions. "The whole hour is work," he told Women's Health. She starts off with eight compound exercises, each of them working two muscle groups simultaneously – like bicep curl as she squats, or situps with combination punches. Next up, 90 to 120 seconds of a cardio interval, like rowing or the VersaClimber, then repeat the entire circuit with heavier weights, added bands, or faster reps. After her 45 minute circuit workout, she might finish with a cardio interval using a rubber Inertia Wave, or one-leg pushes on a curved SkillMill treadmill. After her workout, she will stretch. 

Kate likes splitting up her workouts throughout the day. "I wake up, eat something, and go straight to the gym," she told Women's Health. "If I'm going to do cardio, I'll do it later on in the day," she said. "Do you get winded climbing stairs? Have trouble keeping up with your kids or grandkids? Wish that you had more energy to power through your day? If so, it's a good indicator that you need to either start doing some type of cardio exercise or else kick your current routine up a notch. Even if you can sprint down the block with ease, you're not off the hook. Whether you're young, old, male, female, healthy, ill, pregnant, or disabled, you should be doing some form of regular cardio exercise," says Harvard Health.

Kate likes to jump her way to a hot body. "It makes you feel kind of jolly!" she said. Fellow star Eva Longoria is also a fan. "Take the time to find your own rhythm," she captioned one post. After trampolining: "Significant improvements were observed in the measurements of anthropometric profile and body composition (circumferences, fat mass, lean and muscular mass). Both a significant decrease in systolic and diastolic blood pressure values (from 128/80.5 to 123/71 mmHg, P<0.05) and an improvement in lipid and glucose profiles were observed," said one study.