Jessie James Decker shows off toned bikini body after months-long fitness transformation

Jessie James Decker is flaunting her fitness transformation.

While the country singer has always been in shape, she took to social media this week to share a variety of photos and videos of her new, more toned look – including before and after bikini photos.

"This past week in the Hamptons, a woman complimented my arms and said, 'Gosh, I could probably never have arms like yours,'" Decker wrote. "I looked at her and said, 'Girl, I didnt have these arms in April!'"

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She said that while she's at the same weight she was then, she's been working hard on building muscle and being more consistent, thanks to her JJD Fit app.

"This is the most consistent I have EVER been, and I feel stronger and better than ever and Im NOT stopping," she wrote.

Decker added, "I wanted to share these photos because, of course, I know I looked good on the left, but I feel better on the right. I feel stronger and energized. I feel proud of myself. I feel like Im taking care of me!!"

She explained that very day, she takes 30 minutes to herself, saying, "That little bit of time makes me a better mom and a better person."

"I made a promise to myself…and I dont break promises to me."

Her hard work seems to be paying off in multiple ways – in another video she shared this week, she effortlessly lifted her husband, former NFL star Eric Decker, onto their kitchen counter.

Earlier this year, Jessie told Fox News Digital about how important it is to her family – she and Eric share four children – to be .

"Weve done family workouts together, but we stay active together," she said. "Maybe when were on vacation, were doing bike rides together, or whether its like a football game outside or throwing the ball on the beach."

One sport, in particular, has become a family favorite.

". Thats probably the thing that we all do every day," she said. "We have a pickleball court in the backyard, and if we go on vacation, my husbands like, Is there a pickleball court at this place?"

About her children, she said, "Theyre active. Thats all I can say. They are busy, busy, busy. They dont sit around on iPads. Theyre out there in the wildlife, barefoot and being free."

Fox News Digital's Stephanie Giang-Paunon contributed to this report.