About this exercise
This is a dynamic, bench-supported core exercise performed in a prone plank position. With your forearms resting on a flat bench and your toes on the floor, you extend both arms forward to slide your body into a long, fully-stretched reach over the bench, then pull back to the forearm plank. The forward-and-back sawing motion loads the abs, obliques, and serratus while forcing the core to resist extension and keep the spine neutral.