Jessie James Decker in Bathing Suit Shows Off "Revenge Body"

Set to the tune of her song “Should Have Known Better,” Jesse James Decker strutted along a hallway and stripped down to a bathing suit, in a new Instagram video. “REVENGE BODY MOMENT,” she captioned it, adding a strong-bicep emoji. “Watch them” flag emoji “this one lol #breakupanthemoftheyear.” As the author of The New York Times’ bestselling cookbook Just Feed Me: Simply Delicious Recipes from My Heart to Your Plate, and a fitness lover, Decker knows how to look good. Read on to see 5 ways Jesse James Decker 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 Stays Strong for Her Kids

According to Us Weekly: “The 'Girl on the Coast' singer explained that her active lifestyle makes her know that her ‘heart is in good shape’ and ensures that she has ‘all of the energy to run around and play with my kids, because trust me, they are busy bodies.’”

2. She Doesn’t Love Working Out But Loves the Results

“I dread working out because it’s not my favorite thing to do,” Decker told Us Weekly. “But man, as soon as it’s over I feel amazing and I’m so glad I did it!”

3. She Drinks Water All Day Long

Glasses of water on a wooden table. Selective focus. Shallow DOFShutterstock

“I work out and lift because I want to feel good and have energy. I want to enjoy the foods I love, like pasta and bread and chocolate chip cookies,” the “Flip My Hair” singer told Us Weekly. “I drink water all day long and I try not to eat past 6:30 p.m. I take probiotics and fiber on a daily basis.”

4. She Takes Fiber

“Americans should consume 28 grams of fiber per day if they're following a 2,000 calorie diet, according to the FDA,” says our sister site Eat This, Not That! “Unfortunately, we're getting nowhere close to that amount. A report from the Food and Drug Administration says that the average American woman eats only 15 grams of fiber a day, while the average adult man consumes just under 19 grams per day.” Try navy beans or acorn squash.

5. She Does Pushups and Planks

Decker and husband Eric Decker like to work their core. “This core-strength exercise is called the modified plank,” says the Mayo Clinic.

• “Lie on your stomach. Raise yourself up so that you're resting on your forearms and your knees. Align your head and neck with your back, and place your shoulders directly above your elbows. Tighten your abdominal muscles.
• Create resistance by pressing your elbows and your knees toward one another. Neither should move from their positions on the floor. Hold for three deep breaths.
• Return to the start position and repeat.”