(CNN) -- World and Olympic sprint champion Usain Bolt is back in training after his season was cut short due to injury.
The Jamaican superstar was plagued by back and Achilles problems this summer, which was quiet by his incredible standards.
Bolt finally ended his season on August 10, four days after losing to American Tyson Guy over 100m in Stockholm. It was his first defeat for two years.
But after a break to recuperate, Bolt says he is now fully fit and looking forward to defending his 100 and 200 titles at the world championships in Daegu next summer.
"Training has started and the good news is that I am 100 per cent healthy and am completely over my back and Achilles problems from the summer," he told the official IAAF website.
"I am really enjoying training at the moment. For the first time in my career I was looking forward to getting back into training before my end of season break was over."
Bolt also revealed that his coach Glen Mills was "putting the pressure on early" in the build-up to next summer's championships.
The 24-year-old became a global icon as he won three gold medals at the 2008 Beijing Olympics, completing the 100-200 sprint double and claiming the sprint relay with Jamaica.
At the 2009 world championships in Berlin, Bolt repeated the triple and set stunning world records of 9.58 seconds and 19.19 seconds in the individual events.