There are a lot of jokes we can make here, but we'll refrain!

Khloe Kardashian hit the studio in L.A. yesterday, and the reality star was sporting some seriously bruised knees, and made no attempt to hide them by donning a plaid shirt dress and black boots. The blonde beauty clearly didn't feel like having her picture taken, because she hid her face from photographers as she made her way inside.

We have a feeling her knees probably got a little banged up during her daily training sessions with Gunnar Peterson. Speaking of her gym habits, how phenomenal is Khlo's bod looking lately? She easily has the best physique of the Kardashian clan!

"I work out almost every day. I go to a trainer five days a week, and on the weekends, I do cardio. I kind of eat what I want, but in portion control, which I never knew before. It's really hard. You have to train your body to eat less," she explained to People.

We love her!