"OK guys, so I am in the gym and I am hungover," Kim shared with her fans on her Instagram Story on Friday. "And it's an 8:30 workout, which is a little later than my usual but I figured I gotta get it in. There's no excuses, the gym does not care that I was drunk last night or drunk this morning. The gym does not care."
"I feel good about myself when I'm in shape," she added. "So I gotta continue and not let anything get in my way."
While the workout was harder than usual for Kim, she made sure to "nap" in between sets.
Kim, along with all her sisters, Kendall Jenner, Khloe and Kourtney Kardashian, celebrated Kylie turning 21 with a big bash. The snazzy celeb-filled shindig looked like a total blast, according to the family's videos and pictures they posted on social media.
In one of Kim's clips, she and Kylie take swigs from a bottle, with the mother of three making a face after taking a sip.