STARTING POSITION:
Select the appropriate strength of the band. Stand up straight with the ends of a band in each hand and on either side of your hips and bend your elbows slightly. You should use a neutral grip. Put your feet on the band. Contract your pelvic floor and core while keeping your chest up. The band should have tension from the beginning of the movement.
MOVEMENT:
Lift the hands to your side until your arms are parallel to the floor while you exhale. Return to the starting position in a smooth movement while you inhale. While your are doing the exercise, move only the arms, make sure you don't move any other part of your body.
TIPS: The exercise key is quality over quantity. The trick is to perform the exercise using proper form.