Muscle Group: Shoulders
This exercise allows you to work each delt independently of the other so that your complete concentration can be on one arm at a time. It mainly works the front and medial heads of the deltoid complex.
Take a dumbbell in each hand at shoulder height, elbows out to the sides and with your palms facing forward.
Press one of the dumbbells straight up until it is extended in such a way that it hovers above your head, as you lower the dumbbell, simultaneously raise the other one. Continue alternating till the set is complete.