Normalized power calculator
05-06-12 | 10:03 AM
#2
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From: Boston area
Bikes: 2004 Felt F90, Sette Ace 26" MB, Specialized Shiv TT
After doing some digging, I've found that if you create a training peaks account, you can upload your file and get normalized power for the training session. Got to say, garmin connect is much easier and intuitive to use than the training peaks website. WAAAY to much going on there. Anyhow, that's the only resource I've found so far...
05-06-12 | 11:01 AM
#4
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It also does normalized power and most everything else WKO+ and Apollo Raceday do.
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05-06-12 | 11:02 AM
#5
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From: SE Minnesota
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05-06-12 | 11:19 AM
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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.
Last edited by Drew Eckhardt; 05-06-12 at 11:32 AM.
05-06-12 | 11:54 AM
#7
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Bikes: are better than yours.
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.
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.
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Telemachus has, indeed, sneezed.
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05-06-12 | 01:09 PM
#8
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From: Boston area
Bikes: 2004 Felt F90, Sette Ace 26" MB, Specialized Shiv TT
I'm clear. I'm looking to take a garmin file (which has power data - didn't mention that) and get a normalized power reading for the ride, not just average power. Will be nice when the 910xt finally has this function built in...
05-06-12 | 01:52 PM
#9
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Bikes: are better than yours.
In that case, try ridewithgps. It doesn't give you all the charts, graphs and analysis tools of something like WKO+, Golden Cheetah or even Training Peaks. Since you found Training Peaks overwhelming, you may find RWGPS more to your liking.
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05-06-12 | 05:46 PM
#10
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It is clear what the OP is asking for if you know power.
05-06-12 | 06:25 PM
#12
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::sigh::
When someone specifies he has a "garmin file", says that Training Peaks has too much information, is only looking for normalized power and only mentions experience with garmin connect, it's highly likely that he hasn't digested Allen and Coggan and may not understand what "normalized power" is beyond a reference he might have read somewhere on teh intarwebz. Just saying "X" does "Y" isn't necessarily useful if it turns out that the person you're trying to help might not have the data "Z" to allow that to happen, or have a good idea what "Y" is for or what he might do with it.
When someone specifies he has a "garmin file", says that Training Peaks has too much information, is only looking for normalized power and only mentions experience with garmin connect, it's highly likely that he hasn't digested Allen and Coggan and may not understand what "normalized power" is beyond a reference he might have read somewhere on teh intarwebz. Just saying "X" does "Y" isn't necessarily useful if it turns out that the person you're trying to help might not have the data "Z" to allow that to happen, or have a good idea what "Y" is for or what he might do with it.
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05-06-12 | 06:30 PM
#13
Hi. I'm not suggesting this as a long term solution, but I'm currently developing a software application that, among other things, computes Normalized Power. It can import ride data from a Garmin TCX file as well as several other formats. If you would like to send me one or more TCX files, I'd be happy to load them and give you the results. It computes Normalized Power using the formula in the book Training and Racing with a Power Meter -- I match the Normalized Power of PowerAgent. PM me if you're interested.
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