Wrap a band around a power rack or pole 1-2 feet above head level.
Position yourself on your knees in front of it while gripping either end of the band with an underhand grip at shoulder-level.
Exhale and curl your body forward while keeping your knees firmly in place on the ground and your hands at shoulder-level. Do not allow your arms to help you with the movement.
Continue curling your body forward until you are no longer able to do so without the help of your arms or your knees leaving the ground.
Inhale and allow your torso to straighten, returning to the starting position.