Her background had been swimming and cross-country, "and I thought it can't be too hard to ride a bike".
"I had no idea of the history of the sport at all. Now it would be nice to put myself in the history of it."
Three years ago, Densham's chances of making a significant mark on the sport were problematic. She was pulled from the water in an event in Des Moines, Iowa. A rare heart condition, supraventricular tachycardia, which produced a racing heartbeat, was detected. Surgery late in 2009 corrected it.
This has been a stellar year for Densham, who was battling a throaty cough yesterday. She's had wins in Sydney and Hamburg on the world circuit and goes into today leading Swede Lisa Norden by a slim 30 points.
And to those who are surprised by her performances, Densham isn't.
"I knew I had this level in me. It's always been there. It was just a matter of being fit and healthy and getting in consistent training without any interruptions.
The results are the proof of her talent. Densham's not getting wound up in calculations for today. "I've had other people do the calculations. I'm not interested in numbers really."