Gebrselassie: I'll run until I die

• Teen gold medalist: I hate losing  

• Speed skater: Strength isn't enough  

Human to Hero gets to the heart of what it takes to be a sporting star. The show explores the discipline, dedication and determination involved, as well as the sources of inspiration for the world's best athletes.

Watch Human to Hero at these times (all GMT):
Every Wednesday on World Sport at 1600 and 2130, and Thursdays on World Sport at 0400.
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• Weightlifter challenges stereotypes  

Human to Hero next meets Silvana Lima, a women's surfing star from Brazil.

Lima first got on a board at the age of five and, in 2005, became the first woman in history to be awarded a "perfect 10" score.

Now the proud recipient of three perfect scores, Lima talks big waves and bouncing back from a year on the treatment table.