Keeping up with Khloe and Kourtney Kardashian requires some serious gym time – but from the looks of it, the hard work will pay off.
Khloe posted a photo of herself and Kourtney working on their fitness on Saturday.
Sporting matching black leggings and ab-revealing sports bras, both sisters pulled their waistbands down to reveal toned tummies in the shot.
"Gym selfie with the MILF," Khloe captioned the pic.
Khloe, whose new show, "Kocktails with Khloe," premieres Jan. 20 on FYI, also posted a photo celebrating a new social media milestone after reaching 40 million Insta followers.
"40 Million Followers COME THROUGH!!!!! Cheers my loves! Cheers to your happiness and dancing in the rain!!! ❤," she captioned a sexy shot of herself with sister Kendall and Kylie Jenner.
-- Erin O'Sullivan