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Khloe Kardashian

INFphoto.com

No pain, no gain!

That's the motto Khloé Kardashian and Rob Kardashian have been following as they continue their intensive fitness regimens.

According to their personal trainer, Gunnar Peterson, the two Keeping Up With the Kardashian stars have displayed an incredible work ethic as they continue to reach their respective goals.

"Khloe is always trying to get better. She's not obsessed or a crazy lady about it, it's just about the work," Peterson told E! News exclusively. "Khloe has her head down. She's got a steady work ethic and there's no over analysis."

Rob is just as focused when he enters the gym with his trainer. According to Peterson, the 27-year-old is a hard worker and showing progress.

Rob Kardashian

Vantagenews/AKM-GSI

"Rob's a grinder, he's getting it done," Peterson said. "He's one of those guys who is always going to keep at it. He'll get to where he needs to be and everybody has their path."

While Rob continues to work on his fitness privately, Khloé continues to frequently post about her time in the gym.  Whether snapping shots of her latest fitness attire or posing with her girlfriends after a long workout, the E! star has proven time and time again that working out makes her feel good.

In fact, if it feels like you see the E! star in the gym almost every day, it's probably because she is! 

Rob Kardashian, Khloe Kardashian Odom

Dimitrios Kambouris/Getty Images for E!

"She's a five days a week person, she kills it," Gunnar gushed about his client. "She is always striving to be better."

Based on recent photos, the hard work is totally paying off. But has she reached her goal?

"Everything is a work in progress," Gunnar explained. "As soon as you reach another goal, you're setting another one. "

For more Kardashians, watch Kourtney & Khloé Take the Hamptons premiering Nov. 2 only on E!