Kasia Warnke in Bathing Suit Shares a Special Selfie

Polish star Kasia Warnke is making the most of the spring sunshine, and taking selfies to document herself enjoying the beautiful weather. Warnke, 45, shared a picture of herself posing on a lounger in a black swimsuit, soaking up the sun. How does she stay so fit? Read on to see 5 ways Warnke 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!

Warnke says she goes out of her way to omit sugar from her diet. "I'm picky about food," she says. "Above all, I avoid sugar. It does us the most harm! It's more addictive than cocaine." "The American Heart Association recommends limiting added sugars to no more than 6 percent of calories each day. For most American women, that's no more than 100 calories per day, or about 6 teaspoons of sugar. For men, it's 150 calories per day, or about 9 teaspoons. The AHA recommendations focus on all added sugars, without singling out any particular types such as high-fructose corn syrup," says the AHA.

Warnke admits there are times when her diet isn't the healthiest—but she always turns it around. "There is a period when I take less care of myself, i.e. eat whatever, or even indulge myself, we go out with my fiancé for pizza, ice cream, I eat chocolate every day," she says. "Then there comes a moment when I say to myself "oh no, it's over, tomorrow I start a diet."

Warnke enjoys regular yoga sessions. Yoga is shown to be beneficial for both mental and physical health. "You may feel increased mental and physical energy, a boost in alertness and enthusiasm, and fewer negative feelings after getting into a routine of practicing yoga," says Johns Hopkins Medicine. 

Warnke is a fan of potatoes, which are still one of the most important crops in Poland. "One medium baked potato with the skin provides an excellent source of potassium and vitamins C and B6," says the Mayo Clinic. "And is a good source of manganese, magnesium, phosphorus, niacin, folate and fiber."

Warnke has learned to stick to intuitive eating instead of yo-yo diets. "Recently, there are less and less diets, and more and more conscious eating," she says. "When I feel worse, I eat a lot of vegetables, drink fruit juices, water and, above all, I am physically active – it always makes me feel good. I think I've come to a point where it's cool and I'm not going crazy."