Fix Your Form Tip: Begin with dumbbell extended overhead in both hands with elbows straight up, pulled in toward the ear. Lower the dumbbell behind the head until your forearms are parallel to the ground. Raise the dumbbell, returning to the starting position. Common form issues include (1) not lowering the dumbbell far enough behind the head and (2) allowing the elbows to flair out away from the ears.
When performing rows for back thickness, the rules of range of motion still apply !