Muscled worked: Latissimus Dorsi
Purpose: Strengthen and Stabilize
Form: Begin by lying on a stability ball, resting your head and back on the ball. With dumbbells in each hand, extend both arms directly over your head (Note: The elbows can be slightly bent, but they must stay locked into position). Slowly lower one dumbbell backward until it is parallel to the floor. The dumbbell in the opposite hand should be lowered forward toward the thigh. Perform the movement of both arms simultaneously in a repeated fashion.
Keep core activated, Ribs to hips, and keep the movement slow and controlled.