In the categories of Exercise Ball Ab Workouts, we can take a look at how to do an abdominal curl using the exercise ball. In this exercise, you shall be working the entire muscle groups that are found on the abs. This makes this specific exercise one of the most beneficial of all abs exercises out there. The fist thing is to lay on the exercise ball with your body parallel to the floor and your knees forming a 90 degree angle. When in this position, you lift your shoulders very slowly and with control without ever bending your hips. Hold in position and then go back to the point of starting. Repeat the entire procedure for as long as a full set is for you. The main thing is to be certain that the work is done by the abdominal area, or else the exercise will not be effective.