It’s no secret that Kourtney Kardashian has an insane body. She shared her four favorite waist-slimming exercises from her personal trainer Amanda Lee so us mere mortals can try and get our midsection snatched like the Keeping Up With the Kardashians starlet. The moves are actually pretty standard and you’ve most likely seen (or done) them yourself in a class or on a workout video.

Like most of the 40-year-old’s 10-minute exercise circuits on Poosh, this one has you doing each of the four exercises for 30 seconds straight. Then, repeat the circuit three times. You got this! Now, grab your phone for a timer and get ready to sweat.


The first move is a jumping jack plank. It’s not like a regular plank, it’s a cool plank. Think of it as basically doing a horizontal jumping jack. “Start in a plank position with your shoulders over your wrists, your feet together, and your body in a straight line,” the Poosh site explains. “Jump your feet wide, keeping your buttocks down. Jump your feet back together. Be sure to keep your lower abs pulled in very tightly as you jump your feet in and out.”

Take a deep breath because next up is flutter kicks. This is done laying on your back with shoulders lifted and your legs “extended to a 45-degree angle” — only your lower back and butt should be touching the mat. “Raise your one leg as you lower the other, keeping your knees straight. This move should resemble a fluttering motion. Focus on keeping your core engaged as you go,” the site explains.

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Courtesy of Kourtney Kardashian/Instagram

Ready to get back in plank? We’ll assume you said yes. This time, you’ll start in an elbow plank, which means you’ll keep “your elbows bent and under your shoulders and your feet hip-width apart.” Here comes the ~dip~ part: “Rotate your hips to the right and dip your body almost to the floor. Return to the starting position and repeat on the left side. Keep alternating sides until the set is complete.”

It’s the final move, keep going! The key to a jackknife is to keep your arms and legs straight the whole time while your core is flexed. Poosh explains, “Lie faceup on the floor with your legs extended and arms extended overhead. Simultaneously lift your legs and upper back off the ground, reaching your hands forward to meet your feet so that your body forms a V.”

Four moves, 30 seconds, three times — it sounds like a tricky math equation but it equals a slim waist.