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Kourtney Kardashian, Instagram, Waist Trainer

Instagram

The Kardashian sisters continue to show their love for the waist training fitness trend—and they've got the bangin' bods to go along with it!

Kourtney Kardashian posted on her Instagram page on Saturday a selfie of herself sitting in her massive closet, wearing a blue waist cincher over black leggings, paired with a black semi-sheer halter crop top.

"I am pretty much the queen of multitasking," she wrote. "Obsessed with anything where I am doing more than one thing at a time, especially since I skipped the gym today. A little Saturday morning waist cinching and working on my posture while cleaning out my closet."

Kourtney, 36, had posted similar pics in March and in January, six weeks after giving birth to her third child, baby son Reign, who is now 8 months old.

A photo posted by Khloé (@khloekardashian) on

Sister Khloe Kardashian, 31, shared a waist training selfie on her Instagram page earlier this week. She has slimmed down noticeably over the past year and has been praised for her dedication to her gym workouts. She had also shared a pic of herself in a waist cincher in February.

"I'm obsessed with the gym but a little extra help never hurt nobody," she wrote.

Sister Kim Kardashian, 34, who is currently pregnant with her second child, flaunted a slim figure in a waist cincher last summer.

Other celebs who have jumped on the waist training bandwagon include Amber RoseKim Zolciak-Biermann and Lindsay Lohan. Makers of the corset-like devices say they will shrink inches off users' waists, although waist training has not been proven medically to yield permanent weight loss.