Originally Posted by
burnthesheep
I think the BEST bet for the largest group of people able to do this, starting at the lowest level of fitness..........would be competitive Ironman age-group athletes. Their training and racing pretty much centers around long duration. Their power duration curve probably looks crap from sprint to around 5min, then from 20min through 4hours is probably pretty darn flat. I'd put a nice beer bet on those dudes having the highest count of hour 300w achievers..
Seems like most people see a 10% FTP drop in a TT position. Some of that is due to training time in position, but the aero benefits dictate that one make some power sacrifices in a TT position. So these people would likely need to be able to hold 333.3W for an hour on a road bike to see 300W in an aero position. I think this factor is enough that I'd need to see that there are indeed a lot of fast age groupers with 300W hours...