Start with the dumbbells placed shoulder-width apart, grasping the handles and pushing yourself up into a high plank position.
Begin on your right side. Grabbing the dumbbell, pull your arm back until the weight reaches your chest at a 90-degree angle, elbow tucked into the rib cage. Then, kick the weight back behind you, straightening out your arm, as shown.
Bring the weight back in toward your chest and place it back onto the ground.