Daniela Arnguiz in Bathing Suit Basks in "Winter's Sun" Celebwell

Chilean star Daniela Arnguiz is making sure she gets enough sun, no matter what the season. Arnguiz, 37, shared a selfie where she's posing in front of a mirror in a bright patterned bikini, with matching pink nail polish. "Winter's sun," she captioned the picture. How does she stay so fit? Read on to see

Chilean star Daniela Aránguiz is making sure she gets enough sun, no matter what the season. Aránguiz, 37, shared a selfie where she's posing in front of a mirror in a bright patterned bikini, with matching pink nail polish. "Winter's sun," she captioned the picture. How does she stay so fit? Read on to see 5 ways Aránguiz stays 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!

Aránguiz loves eating tuna and lettuce for a protein-packed meal whenever she wants to reset her health regimen. "Canned salmon, tuna, sardines, kippered herring, and other types of fish are pretty much on a par with fresh fish," say the experts at Harvard Health. "They give you as much heart-healthy omega-3 fatty acids as fresh fish, and sometimes more. These essential oils help prevent potentially deadly heart rhythms. They also work against inflammation and the formation of blood clots inside arteries."

Aránguiz enjoys coffee for a boost of energy. "The overall evidence has been pretty convincing that coffee has been more healthful than harmful in terms of health outcomes," says Frank Hu, chair of the Department of Nutrition at Harvard T.H. Chan School of Public Health. "For most people, moderate coffee consumption can be incorporated into a healthy diet."

Aránguiz cooks her own meals at home as much as possible. Research shows people who cook their own food enjoy more nutritious diets. "We already know that the more people cook at home, the healthier their diet, the fewer calories they consume, and the less likely they are to be obese or develop type 2 diabetes," says Monique Tello, MD, MPH.

Aránguiz loves swimming with her children, which is healthy not only for her, but for the kids too. "Anything that gets their heart beating faster or their muscles working harder counts. Just make sure to keep it fun so that they want to do more of it," says Gwendolyn Wright, MD. "Regular physical activity is important. It helps build strong muscles and bones, prevents weight gain and promotes better sleep." 

Aránguiz hit back at critics who noticed she put on some weight, and says she will always choose good food over being skinny. "I think it was the champagne I drank," she says. "I love to eat, I love to have some champagne or a little wine. I don't want to stop doing it."

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