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.
Another great thing about pullups is the numerous variations that you can perform to more specifically target muscles: 1  Pullup â The classic pullup is executed with a pronated grip (palms facing away from you). Works the upper back, shoulders, lats, and abs. 2  Chinup â Performed with a supinated grip (palms facing you).