How to exercise with the back extension on ball w/dumbbell

Learn how to exercise by doing the back extension on stability ball with arms overhead and dumbbell.
EXERCISE DETAILS:
Primary Muscle Group: lower back
Secondary Muscle Group: levator scapulae, serratus anterior, shoulders, traps - upper
Base Movement: back extension
Equipment: dumbbell, stability ball
Training Type: weight training
Level of Difficulty: 4
Sport Specific: wrestling
Position: arms overhead, face down
Movement Variation: bilateral
Plane of Motion: sagittal
Joint Action: shoulder flexion, shoulder girdle elevation, spine extension