Take two dumbbells and stand in the shallow-end. Bend one leg in front to let your shoulders in the water. Keep your other leg stretched behind. Hold the dumbbells with your arms slightly bent in front, at your torso level and shoulder-width apart. Let your palms face inwards.
This is a combination between the Fly Exercise and the Crossover Exercise
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.
Aqua Exercises for Chest and Upper Back