Speed & Strength
Believe it or not, the vampire's speed is directly connected to their strength. This is also why humans commonly view vampires as being able to fly. It all boils down to their muscle's very construction. When a vampire's muscles develop, it is crucial that the vampire to be hyper-aware of all their muscles. This is because their muscles are developing a super-powered communication with the vampire's instinctual reactions, thereby allowing them to move and have reaction times so quick the human eyes are lucky if they even see a blur. The faster and more precise a vampire's speed and reactions are, the more potential, strength, and power the vampire holds.