10 killing workout for abs 1. Abs Crunch 2. Reverse Crunch 3. Leg raises 4. Russian twist 5. Hanging knee Raises 6. Bur pees 7.Jumping jacks 8.Plank 9. Mountain Climber 10.Oblique crunch Abs Crunch Lie on your back on a mat. Bend your knees and keep your feet firmly placed on the floor. Keeping your hands folded across your chest and your lower back fixed to the mat, raise your shoulders and the top half of your torso until you begin to feel a stretch in the upper portion of the abdominal . Reverse crunch Abs Crunch Lie on your back on a mat. Bend your knees and keep your feet firmly placed on the floor. Keeping your hands folded across your chest and your lower back fixed to the mat, raise your shoulders and the top half of your torso until you begin to feel a stretch in the upper portion of the abdominal . Leg raises The leg raise is a strength training exercise that targets the iliopsoas. Because the abdominal muscles are used isometrically to stabil