Exercise Ball Low Back Extension

Setup
Lie prone on ball. Position toes out wide on floor for balance and hands behind head.
Movement Instructions
Raise torso off of ball by hyperextending spine. Return torso to ball and repeat.
Comments
Movement can be made easier by positioning hips low on ball. In contrast, exercise can be made more challenging by positioning ball lower toward hip. In which case, feet may be placed against base of wall for stability.