When it comes to staying fit and showcasing athleticism, Kristin Cavallari shows that she can give her husband, Chicago Bears quarterback Jay Cutler, a real run for his money.

Kristin Cavallari Rocking Bikini Bod On Beach With Family

While Cutler is a top QB in the NFL (or at least he’s paid like one—playing like one’s a different story), Cavallari gets her blood pumping via a different method: crossfit and gym fitness training.

The reality TV star and author posted a photo of herself on Instagram taking on a massive truck tire, a staple of most CrossFit workouts.

CrossFit has become the most popular workout trend in America in recent months, and it’s largely because of recommendations from celebrities like Cavallari. And looking at her body, it’s hard to argue with the results!

8 Professional Athletes Who Are Noted CrossFit Participants

Maybe Cutler should join his wife beside that tire when he gets a chance. The Bears could use some improved play from that position in 2015!