The gym on a Sunday, just before Christmas? Now that's dedication.
Kim looked pretty chic in her black workout kit too. She paired her leggings and sweatshirt with two essential gym accessories - oversized shades and a quilted clutch bag - and kept her hair swept back in a neat ponytail.
We're guessing that Blac was just there for moral support - those camo trousers and boots don't look too gym-friendly.
Let's hope they were both on their way home for some sofa time with one of these...
More of Kim below: