Abs Exercise Variations (KNOW THE DIFFERENCE!) The upper abs, lower abs, and obliques are engaged in all the following exercises; however, each movement targets specific areas more intensely. Exercise 1: Decline Leg Raise with Hip Lift (Emphasizes the Lower Abs) How to Perform: 1) Lie flat on a decline bench with your feet secured under the padded support. 2) Slowly lift your legs upward, keeping a slight bend in your knees, until they are perpendicular to your torso. 3) Once your legs are raise