A four-minute mile is the completion of a mile run (1609 m) in four minutes or less. It was first achieved in 1954 by Roger Bannister, at age 25, in 3:59.4. As of April 2021, the "four-minute barrier" has been broken by 1,663 athletes, and is now a standard of professional middle distance runners in several cultures. In the 65 years since, the mile record has been lowered by almost 17 seconds, and currently stands at 3:43.13, by Hicham El Guerrouj of Morocco, at age 24, in 1999. Running a mile in four minutes translates to a speed of 15 miles per hour (24 km/h).