If you've mastered the standard ab rollout and are looking for a way to progress, give rollout press-outs a shot. This variation is challenging because it forces you to remain in the most intense position throughout the duration of the set. It's also a great test of shoulder mobility and stability. This is best done with a barbell; the movement will be awkward to do with a basic ab wheel.
How to Do It
To drastically increase the intensity, perform this exercise from your feet instead of your knees.