Avg Power vs Weighted Avg power vs NP

[fandacious]

Power boffs - whats the difference?

[Unknown MTBR]

Average Power includes 0 watt (when not pedaling), NP does not include 0 watt (when your not pedaling)

[Lone Rider]

"Every time there is a rising spike in power, you are expending more energy than if you rode with perfect steadiness and no spike at all. Average power doesn’t account for these minute changes in power and therefore in the energy you used to pedal. Normalized Power does. The concept of Normalized Power is critical for power meter training because it reveals the true effort of a ride by accounting for variability." - The Power Meter Handbook by Joe Friel

[niterider]

Average Power includes 0 watt (when not pedaling), NP does not include 0 watt (when your not pedaling)

 

Not quite.

 

Here's the normalized power definition from the horse's mouth: http://home.trainingpeaks.com/articles/cycling/normalized-power,-intensity-factor,-training-stress-score.aspx

[fandacious]

ok, so lets say ftp is 300w

 

I do a 2hr ride with avg of 250w, but NP is 270w - explain the difference

[niterider]

ok, so lets say ftp is 300w

 

I do a 2hr ride with avg of 250w, but NP is 270w - explain the difference

 

The algorithm weights short hard efforts as worth more than what an average would. So in a race you'd likely see a big difference between the two, versus a training ride with long intervals where they'd be quite close. The theory is that normalized power is a better reflection of the the physiological impact on your body.

[fandacious]

The algorithm weights short hard efforts as worth more than what an average would. So in a race you'd likely see a big difference between the two, versus a training ride with long intervals where they'd be quite close. The theory is that normalized power is a better reflection of the the physiological impact on your body.

 

cool - thanks for the info