The average man runs at a speed of 8.3 mph, while the average woman runs at a speed of 6.5 mph. There are a large number of factors that can affect this speed, such as age, weight and status of health.
Men who are in better shape tend to run faster because they have a higher level of cardio-respiratory endurance. They can run for a longer period of time, and they can maintain their speeds for a longer period of time as well. As of 2015, the fastest man in the world, Usain Bolt, runs at a speed of about 23.3 mph.