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Khloe Kardashian Kendall Jenner

Clearly sisters Kendall Jenner and Khloe Kardashian know the importance of calisthenics. The duo, both clad in spandex, hit their home gym and worked on squats and leg lifts. Get it, girls! (9/7/2013) Credit: Instagram

Celebs Sweat It Out at the Gym

Celebrities just love to take pictures of themselves and post them on social media. And there's a certain group that derives pleasure from showing off the results of their hard work at the gym for all the world to see. Check out our gallery of sexy stars getting fit and fabulous — you'll be glad you did!