Crunch

• Lie on the floor with your arms across your chest or your hands clasped behind your head.
• Keep your feet on the floor 
• Tighten your abs and slowly curl your shoulders up off the floor.
• Curl your shoulders up toward your knees until your shoulder blades come one to two inches off the floor.
• Hold this position for a second before slowly returning to the starting position.
• It is important to let your abdominals do the work and not your shoulders!
• Repeat.