Ajla Tomljanovic in Bathing Suit Spends Time With "My Guy"

It's no surprise Ajla Tomljanovic has an incredible physique—the professional tennis player trains hard and enjoys a healthy diet, with some sweet treats thrown in the mix. Tomljanovic posted a photo of herself on the beach, wearing a pink bikini and blue skirt and she posed with her sweet pup. "My guy ," she captioned the post. How does she stay so fit? Read on to see 5 ways Tomljanovic 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!

As a professional tennis player, Tomljanovic's entire life essentially consists of regular workouts—but she also enjoys her treats. "My guilty pleasure is anything chocolate," she says. "I have a really big thing for homemade cakes, so whenever I'm home I like to bake."

Tomljanovic starts the day with scrambled eggs and toast. "I like to have two pieces of toast in the morning, I like butter, so that's where I indulge," she says. "And then I will have three scrambled eggs as my protein. On days I'm too lazy to make them I grab a yogurt with honey, and can't forget coffee."

Tomljanovic relies on fresh homemade smoothies to keep her energy levels up. "Using a combination of fruit with veggies will help keep the sugar content of your homemade smoothie down," says registered nutritionist Kerry Torrens. "Lower sugar fruits include berries, fruits with stones such as peaches, apricots and plums, as well as citrus fruits, kiwi and avocado. These may be combined with vegetables including leafy greens like spinach and kale, as well as celery, cucumber and beetroot."

Tomljanovic says lunch is one of her favorite meals, and keeps it simple with rice, chicken, and vegetables, something she says never gets boring. Research shows there are benefits to eating the same lunch every day, as it frees up energy used for decision making. "If your daily lunch contains a variety of healthful foods, relax and enjoy it," says Marion Nestle, a professor of nutrition and food studies at New York University.

Tomljanovic enjoys plain pasta with olive oil for dinner, with fish or chicken on the side. "Fatty fish like salmon, sardines, tuna, herring, mackerel, or lake trout are good sources of heart-healthy omega-3 fatty acids," says Sydney Lappe, MS, RDN. "This is unique compared to other meats and also why there are specific recommendations for fish intake. Additionally, fish can be a good source of vitamin D, unlike other meats, and is lower in saturated fats compared to other meats. Similarities between fish and other meats include being a good source of protein and B vitamins."