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.
How Push-Ups Build More Muscle. Logic says the push-up won't build strength unless you're kind of weak to begin with. Its benefits lie elsewhere. If you do push-ups correctly, you develop your scapular muscles and your rotator-cuff muscles to stabilize your shoulders. If you do bench presses instead of push-ups, you don't have to use those muscles as much, says Michael Clark, C.S.C.S., a physical therapist and president of the National Academy of Sports Medicine.