COMMISSIONED OFFICER. Commissioned Officers are the managers, problem solvers, key influencers and planners who lead Enlisted Soldiers in all situations. Enlisted Soldiers perform specific job functions and have the knowledge that ensures the success of their unit's current mission within the Army.
The primary difference between chin-ups and pull-ups is that chin-ups are done with a supinated grip, palms facing in toward the exerciser. This sets up the mechanics so that chin-ups, while still primarily a back exercise, also provide a good arm workout, particularly for the biceps.
Push ups work a number of the muscle groups of your upper torso. The following muscle groups are trained when doing push ups: 1  Pectoral muscles. 2  Triceps (back of the arm).3  Biceps (front of the arm). 4  Front and rear heads of the deltoids.ush ups work a number of the muscle groups of your upper torso. The following muscle groups are trained when doing push ups: 1  Pectoral muscles. 2  Triceps (back of the arm).