Lie upper back supine on floor or mat. With both legs together, knees and hips bent, position outside of leg down to side. Use no weight or hold weight to opposite side of head or across upper chest.
Flex waist, raising upper torso off surface. Return until back of shoulders return to surface. Repeat and continue with movement in opposite position.
Exercise can be performed without added weight until more resistance is needed. Certain individuals ma y need to keep their neck in neutral position with space between their chin and sternum. See Spot Reduction Myth and Arm Position During Waist Exercises.