"The 33"-Road Bike Racing We set this forum up for our members to discuss their experiences in either pro or amateur racing, whether they are the big races, or even the small backyard races. Don't forget to update all the members with your own race results.

Help with Powertap readings

Old 05-17-10, 02:26 PM
  #1  
Jancouver
Senior Member
Thread Starter
 
Jancouver's Avatar
 
Join Date: Jul 2007
Location: San Diego, CA
Posts: 1,104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Help with Powertap readings

Just got PT and downloaded WKO and need some help with readings from the PT.
Below is one lap from Saturday. (Club ride, traffic lights etc)

Can somebody please translate all this so I know what the heck I'm looking at?

Lap 2 (1:34:36.17):
Duration: 1:33:08 (1:34:36)
Work: 1268 kJ
TSS: 248.3 (intensity factor 1.275)
Norm Power: 302
VI: 1.33
Pw:HR: 12.86%
Pa:HR: -2.92%
Distance: 32.842 mi
Elevation Gain: 1177 ft
Elevation Loss: 1494 ft
Grade: -0.2 % (-320 ft)
Min Max Avg
Power: 1 809 227 watts
Heart Rate: 99 178 149 bpm
Cadence: 20 122 83 rpm
Speed: 0 55.4 21.1 mph
Pace 1:05 0:00 2:50 min/mi
Altitude: 10 378 131 ft
Crank Torque: 0 1159 224 lb-in
Jancouver is offline  
Old 05-17-10, 02:29 PM
  #2  
bdcheung
Carpe Diem
 
bdcheung's Avatar
 
Join Date: Sep 2006
Location: MABRA
Posts: 13,149

Bikes: 2007 CAAD9; 2014 CAADX; PedalForce CG1

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Read this: http://www.amazon.com/Training-Racin.../dp/1931382794

Probably should have read it before investing in the PT, but no use crying over spilled milk.
__________________
"When you are chewing the bars at the business end of a 90 mile road race you really dont care what gear you have hanging from your bike so long as it works."
ΛΧΑ ΔΞ179 - 15% off your first Hammer Nutrition order!
bdcheung is offline  
Old 05-17-10, 02:29 PM
  #3  
patentcad
Peloton Shelter Dog
 
patentcad's Avatar
 
Join Date: Nov 2005
Location: Chester, NY
Posts: 90,393

Bikes: 2017 Scott Foil, 2016 Scott Addict SL, 2018 Santa Cruz Blur CC MTB

Mentioned: 68 Post(s)
Tagged: 2 Thread(s)
Quoted: 1013 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Here's a Powertap question: if you get your head unit to 'learn' the ID of a fork sensor or hub, can you then teach it to learn a second fork sensor or hub and will it retain that in its memory? I think the answer is 'yes' because I already have my Ptap head unit recognizing a separate hub and fork sensor, I don't see why it wouldn't retain a third ID once it has recognized it and stored it in memory.

Also, has anyone had any experience with that new fancier Joule head unit Saris has been selling this year? Looks pretty cool. Easy enough to deploy, it's Ant+, you just whack it up on your bike, ID it to the hub and off you go.
patentcad is offline  
Old 05-17-10, 02:35 PM
  #4  
mattm
**** that
 
mattm's Avatar
 
Join Date: Dec 2006
Location: CALI
Posts: 15,340
Mentioned: 143 Post(s)
Tagged: 0 Thread(s)
Quoted: 1060 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Jancouver View Post
Just got PT and downloaded WKO and need some help with readings from the PT.
Below is one lap from Saturday. (Club ride, traffic lights etc)

Can somebody please translate all this so I know what the heck I'm looking at?

Lap 2 (1:34:36.17):
Duration: 1:33:08 (1:34:36)
Work: 1268 kJ
TSS: 248.3 (intensity factor 1.275)
Norm Power: 302
VI: 1.33
Pw:HR: 12.86%
Pa:HR: -2.92%
Distance: 32.842 mi
Elevation Gain: 1177 ft
Elevation Loss: 1494 ft
Grade: -0.2 % (-320 ft)
Min Max Avg
Power: 1 809 227 watts
Heart Rate: 99 178 149 bpm
Cadence: 20 122 83 rpm
Speed: 0 55.4 21.1 mph
Pace 1:05 0:00 2:50 min/mi
Altitude: 10 378 131 ft
Crank Torque: 0 1159 224 lb-in
Not enough info.

How much do you weigh?

How hard did the ride feel?

Your FTP could be set too low unless it was pretty hard, but with an average HR of 149 it doesn't seem too tough. Just a guess.

And yeah the book BD posted, and/or read all this. All of it.
__________________
cat 1.

my race videos
mattm is offline  
Old 05-17-10, 03:37 PM
  #5  
Jancouver
Senior Member
Thread Starter
 
Jancouver's Avatar
 
Join Date: Jul 2007
Location: San Diego, CA
Posts: 1,104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by mattm View Post
Not enough info.

How much do you weigh?

How hard did the ride feel?

Your FTP could be set too low unless it was pretty hard, but with an average HR of 149 it doesn't seem too tough. Just a guess.

And yeah the book BD posted, and/or read all this. All of it.
Thanks for the link. I will read it all

To answer your questions:
195lb
How hard? Well, typical club ride, start easy, then the pace will pick up, then it will be interrupted by some traffic lights. Then there will be a section where we will go fairly hard, regroup, easy to moderate to the final few miles where we go hard.

I guess my FTP was set by default at 160 which is probably too low. My HR max is in high 180s.
Jancouver is offline  
Old 05-17-10, 03:46 PM
  #6  
kudude
slow up hills
 
kudude's Avatar
 
Join Date: Mar 2006
Location: Seattle, WA
Posts: 4,931

Bikes: Giant TCR, Redline CX, Ritchey Breakaway, Spec S-works epic

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
your ftp is > 160 W. guaranteed

Also, just ride around with the ptap for awhile and get a feel for what various efforts feel like.

goal number 1: crack 4 digits on the max
kudude is offline  
Old 05-17-10, 03:51 PM
  #7  
Psimet2001 
I eat carbide.
 
Psimet2001's Avatar
 
Join Date: Jan 2006
Location: Elgin, IL
Posts: 20,512

Bikes: Lots. Van Dessel and Squid Dealer

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 544 Post(s)
Likes: 0
Liked 4 Times in 3 Posts
Yeah...your ftp <> 160. closer to 300. BTW -I hate you.
__________________
PSIMET Wheels, PSIMET Racing, PSIMET Neutral Race Support, and 11 Jackson Coffee
YouTube Channel
Video about PSIMET Wheels
Psimet2001 is offline  
Old 05-17-10, 04:07 PM
  #8  
Jancouver
Senior Member
Thread Starter
 
Jancouver's Avatar
 
Join Date: Jul 2007
Location: San Diego, CA
Posts: 1,104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Psimet2001 View Post
Yeah...your ftp <> 160. closer to 300. BTW -I hate you.
I know you do and trust me, the only reason I went with my LBS, is that they were able to build the wheelset right away since they had the rims/hub on hand.
But no worries, I will be buying some more wheels soon and you will get my business!

J.
Jancouver is offline  
Old 05-17-10, 04:36 PM
  #9  
Bullseye
Senior Member
 
Bullseye's Avatar
 
Join Date: Feb 2006
Location: Boulder, CO
Posts: 498

Bikes: Cannondale systemsix, Raleigh Competition '05

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Jancouver View Post
Well, typical club ride, start easy, then the pace will pick up, then it will be interrupted by some traffic lights. Then there will be a section where we will go fairly hard, regroup, easy to moderate to the final few miles where we go hard.
Keep in mind that when you stop at a traffic light, you will get time to recover, but that time will not be reflected in average or normalized power [hence inflating your numbers somewhat]
Bullseye is offline  
Old 05-17-10, 05:08 PM
  #10  
Jancouver
Senior Member
Thread Starter
 
Jancouver's Avatar
 
Join Date: Jul 2007
Location: San Diego, CA
Posts: 1,104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Bullseye View Post
Keep in mind that when you stop at a traffic light, you will get time to recover, but that time will not be reflected in average or normalized power [hence inflating your numbers somewhat]
Really? Even though the auto pause function is turned off?
Jancouver is offline  
Old 05-17-10, 05:37 PM
  #11  
johnybutts
Senior Member
 
johnybutts's Avatar
 
Join Date: May 2008
Location: Houston, TX
Posts: 3,316

Bikes: Type of horse.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
auto-pause is off, 0s are averaged.
johnybutts is offline  
Old 05-17-10, 07:40 PM
  #12  
NomadVW 
部門ニ/自転車オタク
 
NomadVW's Avatar
 
Join Date: Dec 2005
Location: Sterling, VA
Posts: 3,173

Bikes: 2008 Blue T16, 2009 Blue RC8, 2012 Blue Norcross CX, 2016 Blue Axino SL, 2016 Scott Scale, Fixie, Fetish Cycles Road Bike (on the trainer)

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
If that's only one of the laps, your FTP is set WAY too low. It would be closer to 330-340ish, I'd say. 90 min @ 302, at full effort would normally be ~95% FTP. Assuming it wasn't an all out effort (as it was only 1 of the laps), it was at best 85-90%, which would still be a pretty stiff intensity.

Other than that, there's nothing else to be said about raw numbers.
NomadVW is offline  
Old 05-17-10, 10:49 PM
  #13  
Psimet2001 
I eat carbide.
 
Psimet2001's Avatar
 
Join Date: Jan 2006
Location: Elgin, IL
Posts: 20,512

Bikes: Lots. Van Dessel and Squid Dealer

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 544 Post(s)
Likes: 0
Liked 4 Times in 3 Posts
Originally Posted by Jancouver View Post
I know you do and trust me, the only reason I went with my LBS, is that they were able to build the wheelset right away since they had the rims/hub on hand.
But no worries, I will be buying some more wheels soon and you will get my business!

J.
Haha...no worries. I "hate" you because of your power. We aren't that far apart weight wise and your power is impressive compared to me........but then again....
__________________
PSIMET Wheels, PSIMET Racing, PSIMET Neutral Race Support, and 11 Jackson Coffee
YouTube Channel
Video about PSIMET Wheels
Psimet2001 is offline  
Old 05-18-10, 12:40 AM
  #14  
efficiency
Does Not Exist
 
Join Date: Oct 2006
Location: Voltairia
Posts: 2,094
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I have "the book" if you want to borrow it. Also, did you set your Garmin to record data every second instead of leaving it on "smart recording"?
efficiency is offline  
Old 05-18-10, 02:02 AM
  #15  
Urthwhyte
Senior Member
 
Join Date: Aug 2009
Location: Seattle
Posts: 970

Bikes: Giant Defy 2

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by efficiency View Post
I have "the book" if you want to borrow it. Also, did you set your Garmin to record data every second instead of leaving it on "smart recording"?
Garmin units automatically switch to "Every Second" when they detect a power meter
Urthwhyte is offline  
Old 05-18-10, 06:18 AM
  #16  
bdcheung
Carpe Diem
 
bdcheung's Avatar
 
Join Date: Sep 2006
Location: MABRA
Posts: 13,149

Bikes: 2007 CAAD9; 2014 CAADX; PedalForce CG1

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Urthwhyte View Post
Garmin units automatically switch to "Every Second" when they detect a power meter
are you sure about that? Mine didn't with my SRM. Neither did my friend's, with his PowerTap.
__________________
"When you are chewing the bars at the business end of a 90 mile road race you really dont care what gear you have hanging from your bike so long as it works."
ΛΧΑ ΔΞ179 - 15% off your first Hammer Nutrition order!
bdcheung is offline  
Old 05-18-10, 06:42 AM
  #17  
Urthwhyte
Senior Member
 
Join Date: Aug 2009
Location: Seattle
Posts: 970

Bikes: Giant Defy 2

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by bdcheung View Post
are you sure about that? Mine didn't with my SRM. Neither did my friend's, with his PowerTap.
I'm 99% certain that it's true for the 310XT, and thought that Garmin had patched the 705 to default to it as well, because with smart recording FTP and average power come out as highly inaccurate. Unsure of the 500s status
Urthwhyte is offline  
Old 05-18-10, 08:23 AM
  #18  
Jancouver
Senior Member
Thread Starter
 
Jancouver's Avatar
 
Join Date: Jul 2007
Location: San Diego, CA
Posts: 1,104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by efficiency View Post
I have "the book" if you want to borrow it. Also, did you set your Garmin to record data every second instead of leaving it on "smart recording"?
I just ordered the book last night. Thanks for the offer! I will have to check my Garmin (705) for those data recording settings.
Jancouver is offline  
Old 05-18-10, 08:31 AM
  #19  
Jancouver
Senior Member
Thread Starter
 
Jancouver's Avatar
 
Join Date: Jul 2007
Location: San Diego, CA
Posts: 1,104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Psimet2001 View Post
Haha...no worries. I "hate" you because of your power. We aren't that far apart weight wise and your power is impressive compared to me........but then again....
I'm really not sure where my power is compare to others but since I'm still getting dropped on some of the local rides I know that I need to improve my power and specially my W/Kg and thats why I bought the PT
Jancouver is offline  
Old 05-18-10, 08:34 AM
  #20  
kepst
Guest
 
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
Originally Posted by bdcheung View Post
are you sure about that? Mine didn't with my SRM. Neither did my friend's, with his PowerTap.
This is truth for the 500.
 
Old 05-18-10, 08:37 AM
  #21  
bdcheung
Carpe Diem
 
bdcheung's Avatar
 
Join Date: Sep 2006
Location: MABRA
Posts: 13,149

Bikes: 2007 CAAD9; 2014 CAADX; PedalForce CG1

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
My comments were made with regard to the Edge 705, so we may be talking about apples and oranges here.
__________________
"When you are chewing the bars at the business end of a 90 mile road race you really dont care what gear you have hanging from your bike so long as it works."
ΛΧΑ ΔΞ179 - 15% off your first Hammer Nutrition order!
bdcheung is offline  
Old 05-18-10, 08:43 AM
  #22  
mattm
**** that
 
mattm's Avatar
 
Join Date: Dec 2006
Location: CALI
Posts: 15,340
Mentioned: 143 Post(s)
Tagged: 0 Thread(s)
Quoted: 1060 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by bdcheung View Post
My comments were made with regard to the Edge 705, so we may be talking about apples and oranges here.
Yeah I don't think my 705 did the auto-switch to 1-sec recording.
__________________
cat 1.

my race videos
mattm is offline  
Old 05-18-10, 08:59 AM
  #23  
efficiency
Does Not Exist
 
Join Date: Oct 2006
Location: Voltairia
Posts: 2,094
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Urthwhyte View Post
Garmin units automatically switch to "Every Second" when they detect a power meter
When the Garmin 705 first came out, this was not true, and lots of people had questions about their strange looking ride files.
efficiency is offline  
Old 05-18-10, 09:02 AM
  #24  
Urthwhyte
Senior Member
 
Join Date: Aug 2009
Location: Seattle
Posts: 970

Bikes: Giant Defy 2

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
The 705 bug was fixed in a later firmware, but it was intended to switch automatically
Urthwhyte is offline  
Old 05-18-10, 09:07 AM
  #25  
bdcheung
Carpe Diem
 
bdcheung's Avatar
 
Join Date: Sep 2006
Location: MABRA
Posts: 13,149

Bikes: 2007 CAAD9; 2014 CAADX; PedalForce CG1

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
doesn't hurt to double-check, no matter which Garmin you own.
__________________
"When you are chewing the bars at the business end of a 90 mile road race you really dont care what gear you have hanging from your bike so long as it works."
ΛΧΑ ΔΞ179 - 15% off your first Hammer Nutrition order!
bdcheung is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.