Olivia Culpo just posted a whole series of bathing suit photos on Instagram. She wore a red strapless one, a simple black one, and a white one, among others. Culpo captioned the post, "Some of my fave Revolve bikinis from this past year." How does she stay so fit? Read on to see 5 ways Olivia Culpo 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!

Culpo tells HollywoodLife that she likes to take fitness classes. She says that she loves cycling ones in particular. "I really do like SoulCycle. I just feel like it's an easy meditative way to work out. I can really zone out during that workout." "The feeling of being part of something bigger and the camaraderie forged in group fitness classes is something that quite simply can't be replicated. Group fitness classes exude positivity, and serve as a welcome invitation for people of all different ages, backgrounds, and ability levels to come together in one inclusive experience to move with passion and intention, all without judgement or expectation," says ACE Fitness.

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Culpo also loves Pilates as a way of working out. She tells HollywoodLife, "I think Pilates is also another almost meditative type of workout. You can just forget everything and go through the motions and breathe."

For cardio, Culpo is an avid runner. She says to HollywoodLife that she aims to get a run in as often as she can, even with cold weather. "I like to run. It's a little harder in the winter because it's chilly."

When Culpo needs to eat healthy, she aims to eat a low-carb diet. "I try really hard," she told HollywoodLife. "I really try to cut out carbs when I'm not working. When I'm preparing for something and being good, I cut out carbs. So my ideal good day would be egg whites, avocado, turkey bacon for breakfast. Then, for lunch, I would have a salad with protein, and for dinner, I would have veggies with protein."

Culpo loves to make her own food. She says to Stylecaster that she likes to cook healthy meals for herself. "I have made everything from sweet potato toast to ginger-soy sautéed vegetables. I feel the healthiest when I make the food myself." "In addition to being an excellent source of vitamins A and C, sweet potatoes are a good source of fiber, vitamin B-6 and potassium. And like all vegetables, they're relatively low in calories — one-half of a large sweet potato has just 81 calories," says the Mayo Clinic.