Caroline Buchanan rode in her first big international BMX race when she was nine, waving to the crowd, soaring down hills, gliding through the air. It was a feeling too good to give up.

Even when her brother broke his neck and two arms. Even when she missed out on medals at the London and Rio Olympics.

And even when she ended up in hospital, all of it was worth it. Caroline Buchanan endured to become a world champion in both BMX and mountain biking. And she's not done yet.

Narrated by actor and star of The InBESTigators, Anna Cooke.

Extra narration by Peggy Webber.