Get into the starting position by keeping your back straight and bending over at the waist. Supporting yourself with one arm against a bench.
Your torso should almost be parallel to the floor.
Tuck your upper arm close to your torso and bend at the elbows, forming a 90 degree angle with your upper arm and forearms. This is the starting position.
Moving only at the elbow joint, raise the dumbbell behind you until your arm is fully extended.
Pause, and then lower the dumbbell back to the starting position.
