Speed Demon possesses superhuman motion, running abilities, and reflexes. These abilities are the result of body-wide mutagenic changes induced by the ingestion of chemical compounds of a technically advanced formula. His altered body has greater efficiency in his central nervous system, including the brain, stronger and more efficient musculature structure, and stronger bones. When fully powered Speed Demon can move at supersonic speeds. He can run at his maximum speed for about three hours before fatigue significantly impairs his performance.Speed Demon's superhumanly fast thought processes and reflexes (about six times faster than the average human being's) enable him to perceive his surroundings while moving at high speeds, and to pick up objects and execute complex acrobatic maneuvers at these high speeds as well.