Upper Body Strength, often abbreviated UBS, is one of the core attributes. It is one of the two statistics which are used to calculate Strength, along with Lower Body Strength. Upper Body Strength is used in calculations for any situation involving a character's upper body muscles, as the name would imply. Such situations include swinging heavy weapons and holding onto a cliff to keep from falling off. Internally, UBS is used to calculate the To-Hit Modifier of a character, which is a statistic vitally important to combat.