Primary abilities shared by all speedsters include running at speeds far in excess of human capability (to varying degrees) and resistance to the side effects (air resistance, inability to breathe, dynamic shock resulting from contact with objects at high speed, etc.) that result from such velocity. In almost all cases, speedsters are able to physically attack opponents by striking them while at high speed to impart huge amounts of kinetic energy without suffering harm. A variety of other powers have been attributed to speedsters depending on the story, the origin of the power, and the established continuity and rules of a given universe.