There is also a special null type, the type of the expression null, which has no name. Because the null type has no name, it is impossible to declare a variable of the null type or to cast to the null type. The null reference is the only possible value of an expression of null type.
The military barbell press mainly works the shoulder, or deltoid, muscles. The anterior deltoid, the front head of the shoulder muscle, does much of the work. The side, or lateral, deltoid and the rear, or posterior, deltoid are also involved in the movement, although to a lesser degree than the anterior deltoid.
Muscles Overhead Presses Work. The upper-body push muscles missed by the deadlift are all hit by the overhead press, as long as you use a form that consciously hits the pectorals. When performing the overhead press, you have the choice to bring the bar down behind your neck or to the front, over the clavicles. Behind-the-neck presses work the deltoids and triceps, but miss the pectorals. But overhead presses to the front are the single-best upper-pectoral exercises, and they even utilize the lower pectorals to some degree.