Posterior Deltoid Raises

The best way to do these is to stand with your feet slightly wider than shoulder width apart, bend at the waist, until your back is parallel with the floor. Grab a dumbbell in each hand, holding them at the bottom, so they should be roughly below your face. Swing your arms back, keeping them perpendicular to the body, until the dumbbells are level with the shoulder. Hold for a second, then slowly lower them until they are back below your face.

You can either hold the dumbbells parallel with your spine or at right angles with your spine, do whatever works for you and is most comfortable on your forearms. Again, like front and side delts, this exercise works best when performed with good technique, do not get hung up on using heavy weights if it compromises your form.