He did a huge amount for people with disabilities. He competed at the able-bodied Games, beating out 99 per cent of the world to get there. I would never go to the Olympics and I don't think Oscar should have either because, if you work on the assumption that technology improves, it's inevitable blade runners will run faster than fully-legged runners in the next 50 years.
How do you use that technology best?
My speed is dictated by the level of technology available. At primary school, I had wooden legs with feet of wood and rubber. Carbon plates didn't exist in New Zealand but were in the US. I never knew I was fast until I got the blades, so it was a gamble. My parents always said my running impairment was due to limitations of technology, not lack of ability.
When do they wear out?
The carbon fibre works like a spring. It compresses and it's a case of energy-in, energy-out. They're pretty efficient but, over time, the carbon fibre delaminates and falls apart. When that occurs, you get less energy return per stride.
Will you tie on a new set before Rio?
You don't realise until you put on a new set of blades, then it's like, 'aaah, this feels better'. I'll put on a new set about three weeks out so I get used to them before racing. It's no different to putting on new running shoes, except mine cost a whole lot more. Each blade is about $6000. They're made in the States. Fortunately I'm sponsored by Ossur, otherwise I would never have made it to Rio.