Did you know that a classic straight pull-up can be used as a test to check how much healthy strength your upper body can generate? For most of the pull-up movement, chest and shoulder position doesn't really matter, but to touch the bar with your sternum, the chest needs to be open and shoulders depressed. This means that if you have the strength to perform most of the pull-up, but lose it at the end and are unable to touch the bar with your sternum, it's because your nervous system is not used