50 yds is not a recognised distance in competitive swimming, the closest distance actually competed is 50m freestyle which is approximately 10% further and the world record is 20.48s by Amaury LEVEAUX
For girls:
The following times are the world records for the 50 meter backstroke for men and women and in short course (25 meter) and long course (50 meter) pools.
Men's 50m Backstroke:
Long Course: 24.04 seconds by British swimmer Liam Tancock at the 2009 FINA World Aquatics Championships in Rome.
Short Course: 22.61 seconds by U.S. Swimmer Peter Marshall at the 2009 FINA Swimming World Cup in Singapore.
Women's 50m Backstroke:
Long Course: 27.06 seconds by Chinese swimmer Zhao Jing at the 2009 FINA World Aquatics Championships in Rome.
Short Course: 25.70 by Croatian swimmer Sanja Jovanović at the 2009 European Short Course Swimming Championships in Istanbul.
The fastest time for the girls 50 meter swimming is 18.19.
20.51 secs
Generally, swimming records are measured in meters. The current world record for a 50 meter butterfly swim is 22.43 seconds, set in 2009 by Rafael Munoz of Spain.
What the hell is a fourth yard?!
4.3
4.40 was Chad Johnson's fastest time.
A two-hundred yard freestyle is an event at a swim meet in which the swimmer will swim the freestyle stroke back and forth across a normal pool four times (twice across, twice back).
Vernon davis
he was the fastest, running a 4.2 forty yard dash.
The NFL's fastest official 40 yard dash time was 4.25 seconds by cornerback Fabian Washington.
Bo Jackson ran a 4.12 but it was not electronically timed and therfore could not be verified. Chris Johnson ran a 4.24 at the NFL Combine: The fastest electronically timed 40 yard dash.
4.33 -Unofficial. His Official fastest time is 4.41
The fastest 10-yard split ever electronically recorded was the 1.40 time recorded by current Tennessee Titan runningback Chris Johnson at the 2008 NFL Scouting Combine.
his fastest was a 4.29 and his slowest was a 4.60