In the shallow-end step in front with one leg. Bend your front knee until your shoulders go under water. Lean your torso slightly forward. Hold the dumbbells out and keep your arms bent 90 degrees at your torso level.
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.
Arm Push-Pulls With Side Jumps