We finish this series with the world's fastest man, Usain Bolt.
In this week's programme David Beckham reveals his feelings about the Olympics being in his hometown.
Meet Haider Rashid, an Iraqi rower.
This week's programme is about Louis Smith, a male gymnast from the UK, who won a bronze medal in the Beijing Olympics.
This week's programme is about Merlin Diamond, a sprinter from Namibia, who has been training for the Olympics.
This week we follow the training of the British triathlete team, including Alistair Brownlee.
Meet Im Dong-Hyun, an archer from South Korea.
This week's programme is about Russian athlete Ivan Ukhov, who is hoping to compete at this year's Olympic Games.
Meet Roberto Custodio, a boxer from Rio.
Rugby will be included in the Olympics 2016 for the first time.
Meet a woman boxer from India, Mary Kom.
Majlinda is a world-class judoka and an excellent student from Kosovo. Does she get any special treatment in her school?
Why does Kenya have some of the best long-distance runners in the world? Find out in this week's Talking Sport.
Bader Uugan is from Ulan Bator in Mongolia and in 2008 he won a gold medal for his country in the Beijing Olympic Games.
Sarah is currently third in the world in judo. She is hoping to get to the Olympic Games in London and win her first gold medal.
How much did his bike cost?