Gemma Gibbons was one of the surprise stars of the London Olympics, upsetting the odds to win a silver medal in the judo.
Since then, she has been encouraging young people to keep fit and active.
And not just in her own sport.
Rags Martel went to meet her at a club in Greenwich:
A water polo test event will get underway later, as the Olympic Park is put through its paces ahead of the Games.
Six major events are taking place at various Olympic venues this week.
An international wheelchair tennis tournament will also begin at Eton Manor today, along with a para archery tournament at the Royal Artillery Barracks.