Athletics stars Mo Farah and Greg Rutherford have shared their tips for young athletes with Newsround.
Mo Farah was a big star of the London 2012 Olympic Games.
He started athletics aged 12 and went on to win two gold medals at London 2012.
Now he has his sights set on the next Olympic Games, Rio 2016.
He shared his tips for young athletes with Newsround.
Mo said: "Focus on yourself. You don't become a better athlete if you have one bad race."
"Keep working, listen to coach and believe in yourself," he added.