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.
Best Answer: Some of these people that are answering you are confusing pull ups with chin ups. In pull ups, your palms are facing away from you (some people call this overhand) and this primarily works your back and shoulders. In chin ups your palms face you (some people call this underhand), this works out your biceps. Chin ups are easier than pull ups to most people. Run, Run, Run!! You can do all the crunches and sit ups that you want, but they don't burn the belly fat.