Sofia Richie in Bathing Suit Has a "Happy Birthday"

Sofia Richie is 24 and celebrating in style. The model reposted a bunch of “happy birthday” posts she was tagged in on Instagram, and it was a great excuse to show off some stunning bikini pictures. “Happy birthday to this queen!” her friend Roxy Bijan captioned a shot of them in their swimsuits. How does she stay so fit? Read on to see 5 ways Richie 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!

1. She Loves To Bake

Sofia Richie/Instagram

Richie is a prolific baker, and loves to make sugar cookies and apple crumble. “Baking is an opportunity to clear our heads and de-stress,” says Pamela Honsberger, MD. “When you focus your attention on an activity like baking, you’re more present in the moment and less focused on stressors of the past or future.”

2. She Enjoys Pilates

Sofia Richie/Instagram

Richie frequently does Pilates workouts on a Reformer machine. “'It's brilliant for everyone as it's an inclusive workout method,” says James Shaw, Pilates instructor at Frame. “Whether you’re a pro athlete, office worker or new to working out, reformer pilates will help develop your whole body.”

3. She Hits the Treadmill

Sofia Richie/Instagram

Richie likes using a treadmill for cardio workouts. “Exercise has a dramatic antidepressive effect,” says David J. Linden, PhD. “It blunts the brain’s response to physical and emotional stress. “Voluntary exercise is the single best thing one can do to slow the cognitive decline that accompanies normal aging.”

4. She Loves Horseback Riding

Jean Baptiste Lacroix/Getty Images

Richie has been horseback riding since she was a little girl, and still enjoys the exercise. “Riding a horse for 45 minutes at a walk, trot and canter can burn up to 200 calories,” says Dr. Dennis Sigler, a Texas A&M AgriLife Extension Service horse specialist and professor in the department of animal science at Texas A&M University in College Station. “If you do something a bit more strenuous such as cutting or reining, that can come out to nearly seven calories per minute for the entire length of the riding period.”

5. She Has Eggs For Breakfast

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Richie enjoys cooking eggs for a healthy, protein-rich breakfast. “Looking at the nutritional breakdown, one egg contains roughly 75 calories, 5 grams of fat, 6 grams of protein, 0 carbohydrates, 67 milligrams of potassium, 70 grams of sodium and 210 milligrams of cholesterol,” says Anne Harguth, RDN. “Eggs are also a great source of vitamins A, D and B12, as well as choline, which is a nutrient that's essential in many steps of metabolism. Except for its cholesterol content, one egg is a healthy option for breakfast lunch or dinner.”