Kim Kardashian and Blac Chyna compare bodies on Instagram

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Kim Kardashian and Blac Chyna got their workout on to start the new year. The two women took to Instagram to compare their bodies in the middle of an exercise session.

Wearing sports bras and exercise pants, Kardashian and Blac Chyna -- the fiancee of rapper Tyga -- showed off their sleek bodies on the social media website. Kardashian in particular revealed that she's been dedicated to her physique since giving birth to her first child, daughter North West, in June.

In one photo, Kardashian flaunts her tiny waistline and abs. In another, she and Chyna compare behinds.

"Getting right for the new year," Kardashian writes.

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Photo/Video credit: Instagram