The Keeping Up With the Kardashians star shared that she's on a new workout routine via her social media, and it's all because she wants to look this good in a swimsuit again.
"This is why I started working out today..." the mother of Mason and Penelope Disick captioned this sexy shot of her toned body in a bikini.
The 34-year-old E! reality starlet also shared a present day pic Tuesday of a selfie wearing no makeup and tight leggings at the gym.
"Day one," she simply wrote. She also posted a Keek video of herself on the StairMaster yesterday.
We think Kourtney, who's a super healthy eater, looks great the way she is, but it's always good to have a goal in mind that will get you to the gym.
It seems the entire family has been on a fitness kick lately! Khloe, Kim and Kendall have all shared gym pics recently, and Kris Jenner just reposted a bikini shot.
Looking good, ladies!
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Gallery | Sweating With the Stars