The mom-of-three maintains a "healthy lifestyle" to help keep her feeling and looking her best, and is a big advocate for running, often going on a three-mile jog through her neighborhood.
"It takes about 30 minutes — it's a great workout. It keeps me in shape, and I feel like it helps clear my head for the day," she once told Country Living.
Christina also focuses on good skincare, telling Us Weekly: "I eat healthy and organize. I prioritize good facials and skincare, and I do IVs. I do a lot for my health because being on and having energy is so important to me."
And no matter how busy her schedule is, Christina makes sure to "move every day," adding: "That usually consists of a nice walk with the dogs or a light 20-minute cardio routine or the Peloton."
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The TV star has changed up her routine slightly over the years, admitting she can no longer "work out really hard."
"If I didn't run five miles, I felt like my head was going to explode," she added. "Then it started making me feel sick. Now if I overexert myself, I don't feel great."
Christina Haack on vacation with her boyfriend, Christopher Larrocca
Her efforts have kept her in great shape and feeling confident when she strips down to her two-pieces, whether she's in a designer number or classic black.
HELLO! takes a closer look at Christina's hottest bikini looks to date.
Christina slipped into a classic black bikini in May 2020 while her marriage to her second husband, Ant Anstead, was on the rocks (they announced their split four months later). Nothing shows your ex what he's missing better than a hot bikini pic.
Christina used the same tactic in 2024 during her divorce from her third husband, Josh Hall. However, this time, she upgraded her bikini to a black Louis Vuitton triangle two-piece with the fashion house's signature monogram printed in white.
Christina added a twist to her classic black bikini
Classic black
On the eve of her 42nd birthday last year, Christina treated her fans to this stunning photo, showing off her toned physique in a classic black bikini with a twist of gold hardware.
Christina enhanced her tan in a classic white bikini
Champagne life
Christina was "Living my champagne life to the fullest" in February 2026 during a vacation with her boyfriend, Chris Larocca, and friends. Her classic white string bikini enhanced her bronzed skin as she posed for this fun photo in a hammock over a pool.
Christina looked gorgeous in a beige crochet bikini and cover-up during her beach getaway to Cabo San Lucas, Mexico, in March 2026. The shot featured the TV star enjoying a glass of champagne as she took in the gorgeous beachside views.