Take It Or Leave It Abdominal Crunch

This aptly named move will set your abs on fire. And you can take it!
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Take It Or Leave It Abdominal Crunch
  1. Lie down on your back, arms and legs extended, holding a Swiss ball in your hands.
  2. Engage your abdominals to lift your legs toward the ceiling and shoulders off the floor (Don't let your legs go past 90 degrees).
  3. Pass the ball to your feet, and return legs and arms toward the floor, keeping your limbs extended.
  4. Maintain tension on the abs, as you lift your arms and legs upward again, passing the ball back to your hands to complete one repetition.