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. Push-ups are upper body muscular endurance exercises that target your chest and arms specifically. Lie face-down on the floor with your hands slightly wider apart than shoulder-width and your toes hip-width apart. In a controlled motion, push yourself up, tighten your core and straighten your back.