The shoulder press is performed while seated, or standing by lowering a weight held above the head to just above the shoulders, and then raising it again. It can be performed with both arms, or one arm at a time. This is a compound exercise that also involves the trapezius and the triceps. The military press is similar to the shoulder press but is performed while standing with the feet together. (It is named "military" because of the similarity in appearance to the "at attention" position used in most militaries) Unlike the seated shoulder press, the military press involves the majority of the muscles of the core as stabilizers to keep the body rigid and upright, and is thus a more effective compound exercise. -Wiki-
