Usain Bolt held the hammer throw world record.
Usain Bolt . He is the first person to hold both the 100 metres and 200 metres world records since fully automatic time became mandatory . Bolt improved upon his first 100 m world record of 9.69 with 9.58 seconds in 2009 -- the biggest improvement since the start of electronic timing . He has twice broken the 200 metres world record , setting 19.30 in 2008 and 19.19 in 2009 .