Push the dumbbells forward, across your chest, until you extend both your arms in front. Then pull as you bend your elbows to return back to the starting position. Feel the resistance in both directions; as you push and as you pull. You can also perform this exercise by alternating arms, as shown in the second image.
Inhale as you pull. Exhale as you push.
Feel your chest muscles as you push your arms. Feel your upper back muscles as you pull.
If you don't have aqua dumbbells, you can perform the same exercise with pool noodle. Hold the noodle with both your hands under water, then push and pull using the same technique.
Arm Push-Pulls With Side Jumps