STARTING POSITION:
Select the appropriate weight of the dumbbell. Stand up straight with a dumbbell in your right hand next of your hip. You should use a neutral grip. You should place your left hand on a chair for a better stability. Contract your pelvic floor and core while keeping your chest up.
MOVEMENT:
Without bending the elbow, lift the weight to your side until the arms are parallel to the floor while you exhale. Return to the starting position with a smooth movement while you inhale. During the movement, move the dumbbells slightly in front of you. Repeat the movement for the specified amount of repetitions and then repeat with the other arm.
TIPS: While your are doing the exercise, move only the arms, make sure you don't move any other part of your body. The exercise key is quality over quantity. The trick is to perform the exercise using proper form.