In this video tutorial, viewers learn how to do side crunches on an exercise ball. Begin by sitting on the exercising ball. Then roll down on the ball until the back is resting on the ball. Now sit up using your abdominal muscles and twist to the sides. Exhale as you go up and inhale as you go down. This exercise targets the abdominal, core and oblique muscles. The level of this exercise is intermediate. This video will benefit those viewers who are interested in health and fitness, and would like to learn an exercise using an exercising ball that will build the core muscles.