Danica Patrick is one of the most well-known and successful female race car drivers of all time. She's also become a wellness maven with her Pretty Intense plan and book. Patrick is enjoying an ice bath, and just shared a new photo from her friend, on her Instagram story. In it, Patrick plunged into an outdoor tub. She wore a pale orange bikini bottom and a light turquoise top, showing off her figure. Patrick's friend captioned the photo, "Cold plunging like a champ." How does she stay so fit? Read on to see 5 ways Danica Patrick 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!

Patrick opened up about her wellness in her book, Pretty Intense. She says that she believes in having a positive mindset. "You are creating your life day by day with your thoughts. Think positive things. Believe in yourself. Have great reasons for why you're doing what you're doing."

One of Patrick's secrets is having a good relationship and approach to diet and fitness. "What I'm hoping is that people really realize that this is a lifestyle," she said on Good Morning America. "I want them to develop a good relationship with food and exercise to not be a reward or punishment but a way of life and something that makes you feel good and something that makes you a better you every single day."

Patrick is all about consistency when it comes to wellness. She tells Good Morning America that one of her secrets is knowing why she needs to do certain things. "The most important part is that you figure out why you're doing it," she said. "For me, I do it because it makes me feel good,  so therefore I keep doing it."

Patrick revealed some of her diet secrets on her website. She says that she decided to take a test to find food sensitivities. After getting the results, Patrick adjusted her diet. "At the beginning of 2013, I took a test that scanned my blood against the ninety-six most common foods. When the test said I have an 'extremely high' reaction to egg whites, egg yolks, gluten, yeast, and all dairy items, I wanted to cry! All that discipline had been doing my body no good at all! I began to wonder if the reason I sometimes felt bloated and fatigued had something to do with my reaction to those foods. That test changed my life. Shortly after I cut those foods out, I realized I had a higher and more consistent energy level day after day. I also did not feel uncomfortable after eating, ever."

Patrick revealed on her website that she follows the Paleo diet. She says that she decided to try it for a period, and decided to stick with it going forward. "It was not that hard to do, and I loved both the change in food and the results I was starting to see. I was starting to actually see upper body muscles and abs! What?! Let me tell you, people, I have worked out hard and I have been really picky with food, but these results were by far my best. Paleo formed the origins of Pretty Intense, which I've continued to tweak until I created the most effective plan I've ever put myself on."