Instructions

• Hold your trunk tight and keep your back as straight as possible
• Lie back on the bench with your hands across your chest
• Sit straight up
• Crunch your abs aiming for your elbows to touch your knees
• Lower yourself so your upper back touches the bench
• All movement should be generated by your abs, try to minimize the use of the hip flexors

Muscles involved

• Rectus Abdominis
• Iliopsoas