Seriously.
Having been using power now for 9 months, I have had a good chance to have a look at how the information can be useful. The weekend just gone by was my first opportunity to properly do some form of a target time trial over a semi reasonable distance to get an idea of potential pacing for races.
The 80km TT was done on a road bike in 25-30km/hr winds which were far from helpful. It was a lapped course so no real biggie but as usual felt like a head wind all the way around like it always does for everybody even when it is a tail wind
To my point...
My strategy was to keep the power between 250 and 300 watts and every 15 minutes, get ot of the saddle one gear harder to stretch as the course can be ridden seated the whole way around. I got a little excited in the frt hour and was probably a little heavy on the power opver 300 quite a bit but settled into the gal bracket from there fairly well.
The graph above has some smoothing applied to show averages over 4 minute blocks for a general feel. The untouched version has pikes out of the range in each direction here and there. I really wanted to see the trend over the time.
The parts on the graph that are most helkpful are the purple line and the yelow Purple is Torque and Yellow is Power. At a glance, the Torque remained the same and the power remained in the bracket (and above in the first hour). This tels me that the bracket chosen was able to be held for the duration required. Being on the road bike, I would have somewhere around 8-10 seconds/km to be gained on my TT bike (maths based on CdA) so something like 10-11 minutes which aligns with my past performaces over those distances (2:09 actual on raod and projected to 1:58/59 on TT bike).
Where I see the huge advantage in coming is that I now know during testing that I can rie that window for 2:10 or pretty much a half IM bike leg. There were another 20 or so dudes out doing the same session with me. ormally, when I see a reabbit up the road I chase them and would push over what is the power I should be riding at for a well paced TT but with watching the power, I just let them go here and there and reeled them in at other times. It s FAR more consistent that a Heart Rate pacing strategy as it is very easy to push 1000+ watts for a few seonds and not have the HR blip more than a beat or two. Over the course of Half or Full IM bike leg, those 5 second bursts add up and the secons you save correlate to minutes lost on the run... I've been there.....