Sprinting is running over a short distance at the top-most speed of the body in a limited period of time. It is used in many sports that incorporate running, typically as a way of quickly reaching a target or goal, or avoiding or catching an opponent. Human physiology dictates that a runner’s near-top speed cannot be maintained for more than 30–35 seconds due to the depletion of phosphorescent stores in muscles, and perhaps secondarily to excessive metabolic acidosis as a result of anaerobic glycolysis. here is a list of the top 10 fastest runners in the world