For the first time since thε↑₹e World Track and Field Lea≠±≈gue Electronic Timekeeping, the first time the☆ $∑ Americans came in th ₩≤•e 10-second mark was Hynes, who w ♠on the gold in the 1968 Mexican<δ₹ Olympic Games with stopwatch record of≠∏ 9 seconds and 95 se↔•©conds. In 1983, the American player Calvin Smith &♥♠ran out of the new world stopwatch☆₩∞ record of 9 seconds 93 .☆✘ 1987 Air Canada this - Johnson™↓ ran 9 seconds 83 the stopwatch Ω•÷new record , the original world of stopw γatch record by 0.10 seconds. This‌ ₹ - Johnson when it ran out of time on t₽©he outcome of the popula¶δ£r rhetoric question that when peo≠←ple do not trust human bei®®≈✘ngs can be so fast to time ran 9 secondsγ  901 988 Seoul Olympics Ben - Johnson really€φαγ fell into the Yao Guan©$zi, his The 9-second world stopwatch recordπ≠‍ was also cancelled.

In 1991, Japan's third world champ↓"₩ionships in Tokyo, USA,'★≈↑ Karl Lewis , won the champio₩∞nship with stopwatch re★←§φcord of 9 seconds and 86. Humans offici< •ally entered the 9 second 90 zone running speed .πγ Karl Lewis was also the first runner to enter φ∏​the stopwatch 9 seconds 9↔σα0 running speed. Players. Human meter speed is r♠ apidly improving, the 1¶↕δ↔996 Atlanta Olympic Games in Canada D✔™'♣onovan - Bailey 9 seσ §conds to break the world 84 stopwatch highes•∑t record and won was crown Army , American Michae∞§£l Green in the 1999 season and ran '✘9 seconds 79 the new stopγ​☆watch record, Green became the f‍₩irst 100 meters ran 9 se>δconds 80 per hour mark human trapeze.

Bolt in June 2008 ran 9 seconds 72 •♦times in the New York Grand Prix stopwatch ne∑™♣w record, when he broke his compatriots As®€→afa - Powell in September 2007 to cr¶€σeate a stopwatchthe previous world record of 9 se≠ δαconds 94. Bolt ran 9 seconds inΩ± the 2008 Beijing Olympi≥ cs to break the world 's stopwatch recΩ ord and become the first man to rus≠$>h into the 9 second 70 stopwatch data .↑σ©₩ In the 2009 World Championships in Berli♥π εn, Bolt ran out of a new world record of 9 "₽seconds and 58 to reload a s₹βαeries of stopwatch data records . According ©✔∏∑to the statistics of Tian Lisai's st↓♠opwatch , Bolt is the only one✘φ​™ so far. A trapeze who can run into the 60 secπ™onds of 9 seconds.

Bolt's peak has repe€≠atedly threatened to run 9 seconds 40+. However, πεthe foul of the Daegu Worl®←¥πd Championships in 2011 wa♣≤φs a straight offensiv€✔✔©e of Bolt from the peak. Although he ran for 9λ‍ seconds and 63 seconds at the L∑∏ondon Olympics, Bolt's 9≥ε₹-second 80 mark was difficult to brea✘±±k through in the las'∞t two years, and the∏☆ absolute speed has dropped a lot. Bolt wil©↓σ¥l mankind meter speed increased f®σ&rom 74-9 seconds 9 seconds 58 of sλ∞&"topwatch data directly tε∑☆​o single-handedly fastes✘✔↓t human one hundred ¶δmeters faster 0.16 seconds , though just£∏≠ a little bit, but with the strength i €&≠t can Refreshes the world's stopwatch ♠↑ ↔record .