Lie supine on mat with lower legs on bench. Place hands behind neck or head.
Flex waist to raise upper torso from mat. Keep low back on mat and raise torso up as high as possible. Return until back of shoulders contact mat. Repeat.
Certain individuals may need to keep their neck in neutral position with space between their chin and sternum. See Spot Reduction Myth.
Movement can be made easier by placing arms further down away from head.
Exercise can be made more challenging by placing hands further up on head or beyond head. See Arm Position During Waist Exercises. Exercise can also be performed on incline board or with additional weight.