Ok, So I was on youtube looking at videos after seeing something I've only seen once before thats for sale quite locally, A kickbike
Because I'd like to do something like this
Anyway, While viewing video's this one came up in the right hand sight highlights bit.
It just shows, although not in any detail, the pedalling that Obree might have to do.
Obviously he's going for a bit more aero and will be far closer to the ground, but if you also look on the website from the video it lists the advantages, quite an interesting read.