Hook feet under support and lie supine on incline bench with hips bent. Hold plate behind neck or clasp hands behind neck with no weight.
Flex waist to raise upper torso from bench. Keep low back on bench and raise torso up as high as possible. Return until back of shoulders contact padded incline board. Repeat.
Exercise can be performed without added weight until more resistance is needed. Elevate incline to increase resistance. See Arm Position During Waist Exercises. Certain individuals may need to keep their neck in neutral position with space between their chin and sternum. Hip and knee flexors may be involved as stabilizers if incline is steep and no calf support is used. Also see intermediate technique. See Spot Reduction Myth.