SETUP: Take one dumbbell and place your hands flat across the top end of the weight). Sit upright, with chest up & shoulders back for great posture, and with the dumbbell pressed overhead.
REP: With arms extended overhead, allow the dumbbell to slowly begin dropping behind your head, ensuring you only go as low as your elbows comfortably allow you (a 90* angle is enough, any more usually creates stress on the forearms). Press the weight back up to the start position. Try to keep your elbows in as much as you can, but this is one exercise where a little flaring is acceptable.
TIP: If this exercise stresses your elbows but you’d still like to perform it, I recommend switching your grip. Instead of holding the top of the wieght, wrap both hands around the handle. Your hands will be in a neutral-grip, which is easier on the elbow joint.