Go for twist exercises like the Russian twist ... Put your right arm on the mat and your left hand behind your head. Crunch up in a V, getting up on your hip and butt. Keep your legs straight.

Lift your hips, forming a straight line from your feet to your head ... hands on each twist. Do 15-20 reps per side. 5.

Plank variations also strengthen superficial and deeper muscles, and adding the twist moves your trunk through rotation, working the oblique muscles. I recommend adding a variety of exercises to ...

The benefit of Russian twists compared to other ab exercises is that the rotational movement works the obliques, the ab muscles along the sides of your core. To get the most out of the rotations ...