A: So far, the fastest anyone has run is about 27 1/2 mph, a speed reached (briefly) by sprinter Usain Bolt just after the midpoint of his world-record 100-meter dash in 2009. This speed limit is ...

Stephen Vrska, a marathon and ultra runner from Chesterton, Indiana, first discovered the joy of running back in the 6th grade. “My middle school didn't offer football until the following year, so I ...

“Do you think I could beat a horse in a race?” It sounded like a joke whenever I asked. Almost everyone I talked to would laugh or do a double take. Then they would pause and think: Over what distance ...