Usain Bolt can achieve faster running times with no extra effort on his part or improvement to his fitness, according to a new study. A mathematician illustrates how, based on concrete mathematical evidence, Bolt can cut his world record from 9.58 seconds to 9.45. Usain Bolt holds the current 100m world record, at 9.58s, and has been described as the best sprinter there has ever been, dramatically reducing his running times since he first won the world record in 2008.