The 10 minute core blast... 20 minute... and NOW 15-minute! In this awesome core-focused routine, you'll be challenged with 6 new core exercises (you didn't think I'd use the same moves from before, did you?!) designed to build core strength and definition. Get ready to get sweaty with this one! And always remember to just DO YOUR BEST!

EQUIPMENT: exercise mat, towel, hydration, and a positive attitude!