Khloe & Kourtney Kardashian Hit the Gym Before Big Season 10 Premiere of 'KUWTK'

Khloe Kardashian keeps a low profile in a baseball cap while leaving a friend’s house after the gym on Thursday (March 12) in West Hollywood, Calif.

That same day, the 30-year-old reality star’s older sister Kourtney was spotted in workout gear while out and about in the Woodland Hills area.

“I cannot believe that season 10 of keeping up with the Kardashian’s premieres this Sunday, March 15 only on E!!!! Season 10?!?!?!?!?! Wow!! Time flies! I can’t wait for you guys to turn in this Sunday!” Khloe tweeted.

In case you missed them, check out three new clips from the upcoming season of Keeping Up with the Kardashians!

35+ pictures inside of Khloe and Kourtney Kardashian out and about…