10 reps each arm, 2 sets, constant slow motion alternating sides
1. 2 lb weights in each hand.
2. Sit on the ball.
3. Walk forward as you lean your shoulders back until the ball supports your lower back.
4. Higher on ball makes it harder.
5. Hold both arms straight out in front.
6. Tighten your buttock muscles and core.
7. Slowly lower one arm 90 degrees to the, move steadily through the motion.
8. Repeat with other arm.