The Harbinger Ab Crunch delivers a simple and convenient way to target your upper body and core – all with one device. The innovative design and patented shape make it easy to move from crunch to push-up (or dip) with one flip. The Harbinger Ab Crunch reduces strain and supports your head, neck and shoulders so you can focus on targeting your abdominal muscles. Perform crunches comfortably and effectively. Flip over for push-ups, dips and a total body workout. Perfect for all fitness levels.