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The military press is a variation of the overhead press weight training exercise using very strict form.
The military press targets the deltoid muscles in the shoulders as well as the triceps. Additionally, it works the core and legs, which the lifter uses to help stabilize the weight.
The lift begins with the lifter standing with the heels touching and the barbell on the anterior deltoids. The lifter then raises the barbell overhead by pressing the palms of his hands against the underside of the barbell.
The deltoid muscle has a dynamic activation to about 90–120 degrees of abduction. After that it has an almost static function the rest of the lift. The rest of the movement is mainly due to contraction of Trapezius muscle pars acendens, Serratus anterior muscle and trapezius pars decendens. They work together to tilt the Scapula to a position that makes the glenoid cavity point superiorly enabling the last degrees of abduction of the shoulder. Other contributing muscles include the Supraspinatus muscle and biceps brachii muscle caput longum. The rotator cuff is also active to pull the caput humeri into the glenoid cavity and counteract the superior forces of caput humeri created by the deltoid. The triceps contribute to the extension of the elbow, and counter act the force from biceps caput longum.
See also 
Further reading 
- Mark Rippetoe with Lon Kilgore, Starting Strength, The Aasgaard Company Publishers, 2005, ISBN 0-9768054-0-5.
- A.I. Kampanji, "The physiology of the joints, Volume 1: The upper limb