John McAvoy grew up in a family in which crime was a way of life, and believed it was the way life was meant to be lived. While in prison something happened that changed McAvoy's life, transformed his mindset and gave him something to strive for.

Casey Brown is an unstoppable force of nature. Growing up in a home that was a deep hike into the woods, Casey has always known she is capable of adventure. No matter how hard she's fallen off her bike she always gets back up.

Kayaker Sadat Kawawa was born and raised in Uganda, where he was taught to revere water and not to risk his life in it. Teaching himself to swim at a young age, Sadat could not get enough of the water.

Irish brothers Gary and Paul O'Donovan grew up in a small town of about 2,000 people. The brothers' training equipment and gear is all primarily homemade, but their drive and love of rowing took them to the 2016 Olympic Games.

James Golding hopes the same intense drive and ambition to overcome cancer twice will see him through one of the hardest cycling races in the world. Follow his journey to the Race Across America.

Discover the story of how identical twins Lizsurley and Queensaray, who grew up in the Colombian jungle, first got into BMX and overcame a lack of resources to become pro athletes.