In 1963, Bob Hayes set a world record of 9.1 in the 100-yard dash. However, at the Beijing Olympics in 2008, Usain Bolt established a world record in the 100-meter dash of 9.69. Today, sprint distances are measured in meters, not yards, and 100 meters = 109.361 yards. As Mr Hayes in his record-breaking effort ran 1 yard every .91 seconds, his time for 100 meters would have been at least 9.95 seconds, or more than 1/4-second (.26 seconds) slower than the record set by Mr. Bolt in 2008.