Originally Posted by
kudude
if you're WR, though, and you put out 1200W for the first 10", that greatly affects the 1' average. the point isn't that the average over a large group is similar, it's that you want to find out if you're the outlier
Well, your assertion made me break out the spreadsheet and play with some numbers. I grabbed this kilo power profile from analyticcycling.com:
http://analyticcycling.com/DiffEqMotionKilo_Page.html
If the first five seconds of the power readings were off by 20% in one direction for the iBike unit, the overall impact on the average power over the 60-sec interval would be around 3%. I think this is a reasonable variation; near the claimed accuracy of a PT.