Combine two ab-strengthening workouts into one by doing planks on a stability ball. Fitness expert Kristin McGee shows us how to plank on a stability ball for sculpted abs. Watch…

Do a round of this yoga-inspired move to strengthen your obliques. In this video, Kristin McGee shows us how to execute Windshield Wipers, which will tone and strengthen your whole…

Flashback to the days of enjoying peanut butter power snacks at the kitchen table and hitting the monkey bars on the playground until Mom reeled you in for an early…

This advanced Pilates-inspired move can help you get a stronger core in no time. In this video, fitness expert Kristin McGee demonstrates how to do a Teaser for an intense…

Here's a great way to build your core while lying down (and without crunches). In this video, fitness expert Kristin McGee demonstrates the Swan Dive exercise, which strengthens your back…

Tighten your core and sculpt your obliques with this calorie-torching exercise. In this video, fitness expert Kristin McGee demonstrates how to do Medicine Ball Russian Twists to tone your abs.

Here's a great way to strengthen your obliques for a tighter core. In this video, fitness expert Kristin McGee shows you how to use a stability ball to do the…

Adding a stability ball makes an ab workout even more challenging. In this video, fitness expert Kristin McGee demonstrates how you can do the Jumping Jack Reach move on a…

This is a great move for targeting your abs. In this video, fitness expert Kristin McGee shows us how to do the Low-Belly Leg Reach, which strengthens your ab muscles…

Who knew an ab workout could be so much fun? In this video, fitness expert Kristin McGee shows us how to use a Hula Hoop (yes, really!) to tighten your…