Shoulder exercises can be done with dumbbells, bars or boxes, in all cases internal, external and posterior deltoid and trapezius work; therefore harmony in the size and shape of the upper body depends on the attention given to the biceps, triceps and forearms as shoulders, the latter up arms with uniting torso muscles of the back, neck and chest.
RageDNA
When we run back exercises, chest or arms, delts also recruited to perform one or other action of varying intensity according to the demand of the movement made; seems why it is not necessary to train them in particular, but the truth is that if you want to wear a big, strong shoulders must give attention with careful training.

Barbell Military Press
barrade military press with stand up straight and open to shoulder height legs, you can also forward a foot to charge less back.

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