Fastest Speed of Human in Sprinting
The fastest verified speed of a human is about 44.72 km/h (27.8 mph), reached by Usain Bolt during the 100 meters at the 2009 World Championships in Berlin. This top speed was measured between the 60- and 80-meter marks. It remains the official world record for the 100 m at 9.58 seconds.
Fastest Speed of Human in Other Activities
In cycling, the fastest human speed is over 183 mph (295 km/h) in a fully faired recumbent bicycle, set by Fred Rompelberg in 1995 with a pace vehicle. In skiing, the speed record exceeds 250 km/h (155 mph) on a ski slope. In freefall, Felix Baumgartner reached about 1,357.6 km/h (843.6 mph) in 2012, or Mach 1.25, during a stratospheric jump.
How Fast Can a Human Go Without Machines
Without vehicles or sleds, the fastest unassisted human speed is the 44.72 km/h (27.8 mph) sprint record by Usain Bolt. Studies suggest the absolute biological limit for a fit sprinter is around 40 to 45 km/h, constrained by muscle fiber type, limb length, and ground contact force. For more details, see the World Athletics biomechanics research page at World Athletics biomechanics.
