Human Running Speeds of 35 - 40 mph May Be Biologically Possible

A study published in the Journal of Applied Physiology has found that the force limit with which the runner's leg can hit the ground is not the main factor limiting running speed, as previously thought. If the maximum force limit of the leg muscles is achieved, the maximum speed at which humans can run would increase to 35-40 miles per hour, much faster than the current world record holder and Olympic champion Usain Bolt's 28 miles per hour.
The best sprinters in the world apply 8 to 10,000 pounds of force with each step while running. This may sound like a lot, but experts say it is nowhere near the maximum force limit of the human body.
The study was done at the University of Wyoming and included testing subjects running on high-speed treadmills, and included activities such as running forward, backward, and hopping on one foot. They found that the time the foot and ground are in contact are near the same, while running forward and backward. However, the top speeds of these two different gaits are completely different. From this information, they think that the contractile speed limits of the individual muscle fibers affects the maximum speed of the runner. Using a mathematical model to represent the data, they project the highest running speeds of humans to be 35 to 40 miles per hour, using the maximum force the muscles can apply.
I found this article interesting because I never thought a human being would be able to run that fast. 40 miles per hour is almost Superman speed. Even though this only applies to the fastest people in the world like Usain Bolt, I still think it would be cool if the average person could run that fast.