asgelle

Some quotes from Andy Coggan on the use of powermeters for positioning.
http://forum.slowtwitch.com/gforum.c...t_reply;so=ASC

"Looks can be deceiving: it's really nothing but a highly-adjustable, eddy-current braked, ergometer, the likes of which have been around since before 1900. They're almost indispensable when doing laboratory-based research, but almost worthless when it comes to optimizing someone's position on a bike."

and this

In Reply To
>>Very true. Fit is an ongoing thing, but as this fit bike was explained to me, it shows power output as you are riding and you can tweak your position while riding (via remote control and motors controlling seat height, bar height, etc). Thus, you can see if a 3mm raise in saddle height yields more power or less power, or you can see the change in power with a lower or higher saddle to bar drop, etc.<<

"And how, pray tell, do you control your relative effort, so that you know that any changes in power output aren't simply due to you choosing to work harder/less hard in any position? The answer is that, short of making a maximal effort, you can't...and even if you have the time and are willing to repeatedly torture yourself on multiple occasions (to eliminate fatigue effects), you still haven't accounted for adaptation/accomodation. "