Luckily we've taken the guesswork out of it for you. These 30 core exercises from personal trainer and TODAY fitness contributor Stephanie Mansour will target all of these important muscle groups.

Fitness pros share the benefits of having a strong core and the five best daily core exercises for women to achieve a lean, ...

Stand with your feet wider than shoulder-width, toes pointed out. Lower into a squat, keeping your chest up and back straight ...