“Taco Tuesday. I think I only workout so I can stuff my face for taco Tuesday!” the Revenge Body host quipped. “PS- I have no idea why my abs look so strong in this pic but I had to post so I don't feel so guilty about gorging tonight!!”
In the black and white shot, Kardashian is rocking a sports bra and leggings that show off her hourglass figure and her toned tummy.
The reality star has been committed both to her fitness and to Taco Tuesday. Earlier this month, she shared a video of herself working out with boyfriend, Tristan Thompson, in preparation for the weekly event.