Join the Women's Health Weekend Challenge to help you meet your fitness goals fast and make your weekend workouts count. Thousands of women already have. Join them, and achieve your fitness goals faster!

Pistol Squat: Get ready to blast your booty. "When done right, you're guaranteed a sore rear after a pistol day!" says 2014 Next Fitness Star Emily Schromm. "It's the best butt move." The crazy-cool squat variation works your core, quads, calves, and those glorious glutes.

Want to make it even harder? Remove the box. From a standing position, lift your leg, lower your body toward the floor, then return to start. Yowza!

SO…ARE YOU IN?!

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Do you have what it takes to become the 2015 Next Fitness Star? Head to TheNextFitnessStar.com to audition!

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Ashley Oerman
Contributing Writer

Ashley Oerman is a contributing writer at Cosmopolitan, covering fitness, health, food, cocktails, and home. You can follow her on Instagram @AshleyOerman. She is pro-carbs.