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What is an abdominal crunch?

National Academy of Sports Medicine
National Academy of Sports Medicine
answer

An abdominal crunch is an exercise to strengthen the abdomen by contracting it to flex your spine and pull your torso off the floor. To perform an abdominal crunch lie flat on the floor with your knees bent so that the soles of your feet are flat on the floor. Lie flat on your back with your head flat on the floor arms on your side palms down.  To initiate the crunch, use your stomach muscles to pull your upper torso off the floor, continue to look straight up at the ceiling and pull your torso up far enough that your hands move 2-3 inches, then return  to your beginning position.  

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.