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What is the fastest speed of a human?

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The fastest speed of a human running was set by Maurice Greene, who achieved a sprint speed of 26.7 mph.

Note that is anarobic : the highest sustained speed is just over 15 miles an hour - i.e. a 4 minute mile.
So the first is the limit of the legs, the second the limit of the heart.

1st January 2011: As by end of 2010, the highest speed of human recorded was of 44.72 km/h (27.79 mph), seen during a 100 meters sprint (average speed between the 60th and the 80th meter) by Usain Bolt.
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What is the fastest speed that a human can run at?

Answer   During Usain Bolt's World record 100m sprint at the 2009 Athletic Championships in Berlin, Usain covered 20m between the 60th and 80th meter in just 1.61 seconds

What is the fastest speed a human has reached on a bicycle?

Depends on what you think of as a bicycle, and how it's allowed to be ridden. Fastest on something standard-looking on flat ground is about 60 km/h. Fastest unassisted on a fa

What is the fastest human sprinting speed mph?

  Usain Bolt ran the 100 meter dash in 9.58 seconds in 2009. That is an average of 23.35 mph. His top speed was just over 27 mph. http://wiki.answers.com/Q/How_many_mile

What is the fastest speed at which a human has ever traveled?

According to the Guiness Book of World Records, the fastest a human has run is 200 m in 19.32 seconds by Michael Johnson (US) Atlanta, Georgia, July 21, 1996. This about 10.35