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 Oblique Driving-Knee Crunch. Your abs will thank you!
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Author Clint Nielsen
Clint is a dad and husband trying to stay in shape. He's also a highly opinionated fitness enthusiast and author of Reveal The Steel.
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