Polish Abs Exercise

Recently, I added this exercise into my routine.It works on your entire core.

Here's how to do it: Place a bench under and perpendicular with a chin bar. Now hang from the bar with your feet together, knees slightly bent, and legs to one side of the bench. Without changing the bend in your knees, simply lift your legs over the bench to the opposite side. Repeat back and forth for 10 to 15 seconds. Your goal: 2 sets of 60 seconds, with 30 to 90 seconds rest between sets.
I may post a video of this work out. Lets see when I shall do that! :P