To perform Reverse Decline Leg Lifts, lie with your back on the decline bench with your head toward the top (where your feet would normally be. Holding the top of the bench with both hands, hold your legs together and straight out, parallel to the floor. Using your abs to hold your legs in position. Slowly bring your pelvis up and in towards your chest, having your abs control the movement. Slowly lower yourself back to the starting position, always keeping constant tension on your midsection.