Weighted Crunch

Setup
Lie supine on a mat with knees bent and holding dumbbell over chest with both arms extended.
Movement Instructions
Flex waist (contract abdominal) to raise upper torso and roll shoulders up off the ground. Keep arms fully extended with weight in the air and point chin to the ceiling through movement. Return to original position. Repeat.
Comments
Keep chin pointed ot the ceiling and do not rock head to help movement with momentum. Keep arms extended throughout, do not bend elbows or swing weight to help movement.