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.
To do the chin pull, start off with your body and head in its normal position. Then, raise your chin and pull it upwards as far as it can go. You should feel the facial muscles pulling in your throat and chin. Hold your chin in this stretched position for 10 seconds and then relax.