Captain Serious said:
Hmm, I don't know the duration, but I don't remember reading anything about an hour
I am prety sceptical of riders testing, like Christopher Sauser (2008 world champion) test of Epic 29er vs.26 inch MTB, so he claimed (on his blog) that he was faster for 11 seconds with 29 er on 5km hill.
So why we do not ride 29er instead of 26 inch MTB on uphill?.
It was commercial for Specialized Epic 29 er.
That is why i am sceptical about this "From 465 to 293watts"
There is one study „Effects of training in an aero position on anerobic power output“ ; Quote" group of trained cyclist, who was never train on aerobars, and second group trained triathletes who train only on aerobars.
So it was hypothesized that the change in angle between the two positions would impact anerobic power production in a direction that would be specific to training position.
After 30s Wingate test (which has flaws) group who never trains on aero, upright position Peak power was significantly higher in the UP position then in aero. Furthermore this group has higher mean power in the upright position when compared to the aero position
In triathlete group PP was found to be higher in the aero position then in upright. There was no significant difference found in mean power between aero and upright position in this group.
So from these results it is recommended that cyclist train in the position in which they race.
Off course this is a 30 sec test and not a 1hour TT, and this study in difference of others (irelevant data, useless facts, way how it is presented) show us something.
Another study (i love studies) "Influence of different racing positions on metabolic cost in elite cyclists"
Show us this:
In this study, 14 elite male bicycle racers were tested for oxygen consumption (VO2) and heart rate (HR) at 70% of their individual VO2max in three different riding positions during a single test run.
The subjects rode their racing bicycles on a wind braked roller;
1) upright cycling (UP), cadence 90 rpm;
2) hands on drops (DP), 90 rpm; and
3) hands on clip-on aero-handlebars (AP), 90 rpm.
VO2 and HR values in AP were significantly higher compared with UP.
We concluded that riding a bicycle in an extreme aero-position increases the metabolic cost of cycling when wind resistance is not taken into account.
However, when the mechanical power losses of 9 W (estimated by the VO2 increase) are compared with the expected aerodynamic power savings of approximately 100 W,
it appears that aerodynamic advantages by far outweight their metabolic cost.
This guy set an age group (35 to 39) hour record of 48.317km while averaging a 'not-so-massive' 302w. Granted, it was on a world class, indoor velodrome, but still 
Facebook
Twitter
Instagram