Q: How fast is it physically possible for a human to run? — Steve, Davis, California. A: So far, the fastest anyone has run is about 27 1/2 mph, a speed reached (briefly) by sprinter Usain Bo… ...

How fast is it physically possible for a human to run? — Steve in Davis, Calif. So far, the fastest anyone has run is about 27½ miles per hour, a speed reached (briefly) by sprinter Usain Bolt ...

Learn about the top speed of humans and how that compares to the average person. We also look at what impacts running speed, as well as things you can do to boost your speed.

A cheetah’s leg muscles generate four times more acceleration power than the fast-moving limbs of Usain Bolt, scientists have shown. The finding emerged from the first detailed study of the way ...

The limit to how fast a human can run is 9.48 seconds for the 100-meter race, 0.10 seconds faster than Usain Bolt’s current world record, according to Stanford biologist Mark Denny.

Why is it that cheetahs can run so fast? How can humans get to be that fast? In this recent video from Wired, Cheetah biologist Adrienne Crosier and orthopedic surgeon Dr. Chris Raynor explain why ...

Most use the 100m to calculate how fast we can run. The current record for the 100m is 9.58 seconds, by Usain Bolt in 2009. That gives a speed of 23.3mph.

Scientists have discovered a sweet spot in animals that explains why fast moving animals like the cheetah can reach such high speeds. Animals that can run fast, such as the cheetah, tend to be ...