You will need a noodle for the shallow-end exercise. It can also be done with other resistance tools such as paddles, kickboard or aqua dumbbells. Working against floating resistance can significantly strengthen your targeted muscles.
Starting Position: In the shallow end, bend your front knee to put your shoulders under the water. Hold the dumbbells with both hands and keep your arms straight, wide open and slightly below parallel. Make sure the dumbbells are fully in the water too. Face your palms forward.