In the shallow area, bend your knees until your shoulders are in the water. Hold the dumbbells with both your hands. Open your arms to the side parallel to the bottom of the pool.
With both arms straight, rotate your shoulder in small circular motion. Repeat the same exercise in the opposite direction as shown in the second figure.
Inhale with first rotation, exhale with second.
Feel your lat muscle as you push down. If you are using the aqua paddles or just your hands, you will feel the resistance in your deltoid as you push up as well.