Originally Posted by
Drew Eckhardt
We're talking about real power adjusted to better approximate a ride's affect on your stress balance and what you have left over for hard efforts.
You take a 30 second rolling average starting at the 30th second, raise those numbers to the 4th power, and NP is the fourth root of the average (not coincidentally beyond threshold lactate accumulation is proportional to the fourth power of output and things decay with a 30 second half life).
For rides with varying intensity it can be a lot higher than the average power returned by many non-training oriented web sites.
Yeah. I get that. ridewithgps and Golden Cheetah both do that using real power data. ridewithgps will also make guesstimates based on garmin data. It's not clear to me what the OP is really asking for or if it is clear to him either.
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