Hanging Reverse Crunches

What exercise does: These Hanging Reverse Crunches work the lower abs.

Implementation: This exercise is another version of Reverse Crunches, but you'll do it hanging from a pull up bar.
(A) Get into the hanging position and raise your knees up so they are even with your abs. 
(B) From this starting position, bring your knees up as far as possible toward your head, rounding your back and rolling yourself upward into a ball. When you reach the top of the movement, crunch your abs so you get the best possible contraction, then lower your knees to level with your abdomen. Again, don't lower your legs beyond this starting point.  If your legs are too massive from squatting to do these using a slant board.