The ab wheel roll-out is an exercise targeting the abdominals using an inexpensive wheel device with a handle on either side. Many trainers and strength coaches claim it's one of the best exercises for developing strength in the midsection. Beginners may have to start with a limited range of motion or just wheel planks.
Builds and strengthens the abdominals
Entire core must work during this exercise
Different stimulus from more traditional moves such as the crunch and reverse crunch