Speed Force
In DC Comics, the Flash family of speedsters derive their abilities from an extradimensional energy source known as the Speed Force, which grants them superspeed and various other abilities required to use it, such as durability. The Speed Force is a cosmic force based around velocity and movement and is the representation of reality in motion, being the very cosmic force that pushes space and time forward. However, the Speed Force is not the source from which other DC characters with superspeed such as Superman or Captain Marvel/Shazam derive their powers.