Abdominal with Fitball

The Fitball or Swiss ball offers many possibilities for training, introduces variability in the exercises of strength and stretch. One of the possibilities is the work of the abdominal muscles, which often becomes boring to always perform the same type of exercises on the ground.
As we can see in the videos, the Swiss ball offers other possibilities to work the abdomen, both the transverse (first video) as the oblique (second video). In addition to put the ball in the exercises involving makes the coordination in the exercise and not do so mechanical movements.