Quick as can be, Usain Bolt is backtracking on his retirement plans.

Less than three weeks ago, the Olympic champion said he planned to stop sprinting after the 2016 Rio de Janeiro Olympics. But the Jamaican said on Thursday he was looking to extend his career by a year, meaning he could quit after the 2017 world championships in London.

"I am definitely reconsidering," the 27-year-old Bolt said while in London on a book promotion tour.