This exercise works the oblique muscles. It straightens the abs and works the stabilizer muscles, develops coordination and ability to keep balance.
Lie on your side against the exercise ball so that only your hip is on the ball, and your body is hanging.
Your feet should be flat on the floor.
Keep your body straight and your hands behind your head or crossed on the chest.
As you inhale, slowly put down your body by bending at your side.
As you exhale, return to the starting position.
As the exercise ball is unstable, keeping balance requires good coordination which positively affects on your fitness level.