Here we 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 then using a slant board.