Celebrity Kourtney Kardashian Flaunts Her Toned Abs in Workout Selfie By Jonathan Borge Jonathan Borge Instagram Twitter Jonathan Borge is a writer and editor living in New York City. His writing has appeared in Glamour, Refinery29, Forbes, and PAPER, among other publications. Plus, he's held staff positions at Marie Claire, InStyle, and OprahDaily.com. Currently, he's the Senior Entertainment Editor at Bustle Digital Group's Elite Daily, where he oversees digital covers, features and profiles, freelance essays, and strategy for the site's TV/Movies and Celebrity and Music sub-verticals.He primarily writes about pop culture and style, and has a passion for telling LGBTQ+ and Latinx stories. When he's not working, he's likely waiting for Lady Gaga to announce her next tour. InStyle's editorial guidelines Updated on December 29, 2015 @ 04:30PM Pin Share Tweet Email Photo: Allen Berezovsky/Getty Images They say a new year calls for a new you, but Kourtney Kardashian isn’t waiting until 2016 to kick off a sweat-inducing transformation. On Tuesday afternoon, the Keeping Up with the Kardashians star and mom of three took to Instagram to prove just how committed she is to leading a healthy lifestyle. In the plainly captioned image above (“gym selfie”), the brunette beauty poses atop a yoga mag to snap a picture of herself dressed in her calorie-burning ensemble. Sure, Kardashian rocks a pair of high-waisted joggers and a matching sports bra with panache; however, it’s her ripped bod that’s catching our attention. The hard-working beauty flaunts a tightly toned midriff that, as we've seen, also looks nothing but fabulous in a gilded one-piece bathing suit (below). One Direction's Liam Payne Is Abs-olutely Hot in His Shirtless Selfie Thanks for the #fitspo, Kourtney.