BBC Sport meets Faye McClelland, four-time world paratriathlon champion in the Women's PT4 category.
Faye - who will going for her fifth world title in Edmonton later on this year - didn't get into the sport until she was in her mid-twenties, she hasn't looked back since.
If you've been inspired by Faye's story, why don't you check out our Get Inspired triathlon pages for tips and hints on how to get involved yourself.
BBC One has live coverage of the ITU World Triathlon Series from London's Hyde Park on Saturday, from 1400 BST. Paratriathlete, men's, and women's events will be all feature, with the likes of the Brownlee brothers and Non Stanford in action.