Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

"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.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 08-28-11, 06:18 PM   #1
skinnyguy
Senior Member
Thread Starter
 
skinnyguy's Avatar
 
Join Date: Aug 2006
Location: Ontario, Canada
Bikes:
Posts: 249
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
FTP Test w/ powertap on a trainer

I was going to perform a FTP test on my trainer w/ the powertap i just purchased. it is an older wired unit so interference should not be a problem. I was reading around on the net about erratic readings. has anyone had problems with this. i wanted to do it on my trainer so i have the same environment to duplicate the test many times throughout the year. seems logical to me.
skinnyguy is offline   Reply With Quote
Old 08-28-11, 06:57 PM   #2
Apus^2
Senior Member
 
Join Date: Sep 2007
Location: Looking for my right leg muscles.
Bikes: 2000 Cannondale CAAD3 Triple 105/Ultegra
Posts: 1,202
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Never had any issue on the trainer doing a 20 minute test. A lot of people have trouble achieving the same wattage indoor as they do outdoor, so keep that in mind if you do the bulk of your training outside and your testing inside.
Apus^2 is offline   Reply With Quote
Old 08-28-11, 07:21 PM   #3
rbart4506 
You blink and it's gone.
 
rbart4506's Avatar
 
Join Date: Mar 2005
Location: Dundas, Ontario
Bikes: Race bike, training bike, go fast bike and a trainer slave.
Posts: 4,436
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Never had an issue with my wireless unit indoors...And yes test both indoors and outdoors...There is a difference...

Plus! You are in Ontario...It is not winter so you should not be on a trainer yet
__________________
"On the other hand riding down a hill at 55 MPH wearing (essentially) women's underwear and a Styrofoam cup on your head is the epitome of rational life-extending decisions." - RacerEx
rbart4506 is offline   Reply With Quote
Old 08-28-11, 07:46 PM   #4
wanders
going roundy round
 
wanders's Avatar
 
Join Date: Dec 2005
Location: High Point, NC
Bikes:
Posts: 6,081
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
No interference issues with wireless... but I don't think there are enough fans on the planet to keep me from overheating in my basement. I'm about 10% lower indoors vs. out.
wanders is offline   Reply With Quote
Old 08-29-11, 07:28 AM   #5
topflightpro
Senior Member
 
topflightpro's Avatar
 
Join Date: Jul 2007
Bikes:
Posts: 3,899
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 38 Post(s)
Yep, I too have found that I produce significantly lower wattages on an indoor training than during outdoor workouts.

That said, I tend to do a lot of interval workouts on the trainer, so, having an FTP based on trainer work is valuable info.
topflightpro is offline   Reply With Quote
Old 08-29-11, 09:14 AM   #6
Hida Yanra
VeloSIRraptor
 
Join Date: Mar 2008
Location: Deschutes
Bikes:
Posts: 4,543
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
I'll concur with the chorus line, FTP indoor does not equal FTP outdoors.
I track both during the times of year when I'm riding indoors & outside.
Hida Yanra is offline   Reply With Quote
Old 08-29-11, 09:41 AM   #7
miwoodar
Fast for a sloth
 
miwoodar's Avatar
 
Join Date: Dec 2009
Location: Fort Collins
Bikes: Some
Posts: 1,134
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
+1...I'm way lower on my trainer. I can get pretty close on my rollers though.
miwoodar is offline   Reply With Quote
Old 08-29-11, 11:30 AM   #8
skinnyguy
Senior Member
Thread Starter
 
skinnyguy's Avatar
 
Join Date: Aug 2006
Location: Ontario, Canada
Bikes:
Posts: 249
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I will let you know how it goes.
skinnyguy is offline   Reply With Quote
Old 08-30-11, 10:07 AM   #9
skinnyguy
Senior Member
Thread Starter
 
skinnyguy's Avatar
 
Join Date: Aug 2006
Location: Ontario, Canada
Bikes:
Posts: 249
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Test 24min W/U then 1hr TT on the trainer: Avg watts= 280.5. Weighed in 56.42kg so I am at 4.97w/kg. Good ride not ideal prep but I am happy with that. I feel good as I just finished my racing season 2 weeks ago and haven't had a long ride in a few weeks. Winter plan to hit the weights and gain some muscle so I am better on the flats.
skinnyguy is offline   Reply With Quote
Old 08-30-11, 10:24 AM   #10
wanders
going roundy round
 
wanders's Avatar
 
Join Date: Dec 2005
Location: High Point, NC
Bikes:
Posts: 6,081
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
1 hr. @ 280w indoors. I quit.
wanders is offline   Reply With Quote
Old 08-30-11, 10:44 AM   #11
miwoodar
Fast for a sloth
 
miwoodar's Avatar
 
Join Date: Dec 2009
Location: Fort Collins
Bikes: Some
Posts: 1,134
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You're not the only one, Wanders.

Dang, Skinny.
miwoodar is offline   Reply With Quote
Old 08-30-11, 09:31 PM   #12
skinnyguy
Senior Member
Thread Starter
 
skinnyguy's Avatar
 
Join Date: Aug 2006
Location: Ontario, Canada
Bikes:
Posts: 249
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
that was 34.1km/h on my trainer. I did 35.14 about 2 months ago at the peak of my season but that was also at 58kg and before I had a PM to measure my output. I am doing my 1min and 5min tests on friday to complete some more of my power profile so I can start training with my PM now that i have one. to bad I am trapped in a cadets body. will keep you updated if you like.
skinnyguy is offline   Reply With Quote
Old 08-31-11, 06:02 AM   #13
rbart4506 
You blink and it's gone.
 
rbart4506's Avatar
 
Join Date: Mar 2005
Location: Dundas, Ontario
Bikes: Race bike, training bike, go fast bike and a trainer slave.
Posts: 4,436
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Ok...Remind me not to ride with Skinnyguy

Then again, it really wouldn't matter the ride wouldn't last very long for me....

Nice work!
__________________
"On the other hand riding down a hill at 55 MPH wearing (essentially) women's underwear and a Styrofoam cup on your head is the epitome of rational life-extending decisions." - RacerEx
rbart4506 is offline   Reply With Quote
Old 08-31-11, 08:33 AM   #14
brian416
Roadie
 
brian416's Avatar
 
Join Date: Oct 2007
Location: Traverse City, MI
Bikes:
Posts: 1,440
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
5w/kg on a trainer. Wow.....
brian416 is offline   Reply With Quote
Old 08-31-11, 08:58 AM   #15
Psimet2001 
I eat carbide.
 
Psimet2001's Avatar
 
Join Date: Jan 2006
Location: Elgin, IL
Bikes: Lots. Van Dessel and Squid Dealer
Posts: 19,703
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
FTP on trainer....story of my life.

After trainers, powertaps, Quarq, and computrainers a plenty over the last couple of seasons - I ride pretty much the same no matter where it is. I am sure I could probably post a better actual FTP test number if I did it outdoors, but honestly I don't have anywhere that I want to go in order to do that in a safe manner....nor the desire to know the number.

It's crazy though when you can do an FTP 20 min test indoors and then go outside and have a higher average power for a 30 minute crit. In my case though it's from the anerobic engine I have. My crits are just a really long series of sprints and coasting. FTP with constant power output is like asking me to put a 8 inch sharpened stick through my eyeballs.
Psimet2001 is offline   Reply With Quote
Old 08-31-11, 09:00 AM   #16
ridethecliche
Village Idiot
 
Join Date: Jan 2007
Location: Bahstaaaaan
Bikes:
Posts: 20,239
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Nicely done. Now go do it outside and profit.
ridethecliche is offline   Reply With Quote
Old 08-31-11, 05:17 PM   #17
kaiserboy
Senior Member
 
Join Date: Mar 2008
Location: Modesto, CA
Bikes: VanDessel "Hellafaster"/Argon 18
Posts: 266
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
+1.....way lower on the trainer.
kaiserboy is offline   Reply With Quote
Old 09-02-11, 09:33 PM   #18
skinnyguy
Senior Member
Thread Starter
 
skinnyguy's Avatar
 
Join Date: Aug 2006
Location: Ontario, Canada
Bikes:
Posts: 249
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
well my power profile is a little more complete today.

workout which was done outside today:

20min w/u
5min threshold 5 min ri
1min all out 5min ri (530w average 9.39 w/kg)
10min @ 200w
5min all out (352 w average 6.24w.kg)
10min ri
1min all out (could not better my previous)
5min ri
1min all out (same)
2x15sec 2 min ri to test best 5 sec power (780w 13.82w/kg)

limp home

so i learned today that i have the 5 sec power of a school girl and excellent 1 min and 5min power. my snap is obviously a huge weakness of mine but i am not sure i would sacrifice my training time trying to make it better.

Last edited by skinnyguy; 09-03-11 at 04:54 AM.
skinnyguy is offline   Reply With Quote
Old 09-02-11, 10:31 PM   #19
miwoodar
Fast for a sloth
 
miwoodar's Avatar
 
Join Date: Dec 2009
Location: Fort Collins
Bikes: Some
Posts: 1,134
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Well done.

FWIW, my jump is at least 500 watts lower on the trainer. Not being able to throw the bike around completely ruins my mojo.
miwoodar is offline   Reply With Quote
Old 09-03-11, 08:36 AM   #20
Yep
no cat contains
 
Yep's Avatar
 
Join Date: Oct 2006
Location: Scotland
Bikes:
Posts: 694
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Your hour on the trainer at FTP was pretty impressive. Makes me think your true FTP has got to be higher than that...
Yep is offline   Reply With Quote
Old 09-03-11, 02:00 PM   #21
guadzilla
Dropped again
 
guadzilla's Avatar
 
Join Date: Feb 2009
Location: A small tropical island
Bikes: Damocles, Shiv, Lynskey, X-Fire, LHT, +
Posts: 3,456
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I find that I am consistently around 30W lower on the trainer than I am on the road - based on both testing and RPE.

Ironically, I've also noticed that the power reading on my Kurt Kinetic wired computer is about 30W higher than the PT (had posted a question about this here last year, actually), so I use more or less the same numbers on both my trainer and the road, and it works out ok.

I just tested my CP20 as 250W* (on the KK computer) on the trainer last week, just before starting my build phase - am going to test it on the road next weekend and I expect the numbers to be similar.

*Of course, for me that is only a measly ~3.5W/kg so excuse me while I go kill myself after seeing skinnyguy's numbers.
guadzilla is offline   Reply With Quote
Old 09-03-11, 02:14 PM   #22
echappist 
fuggitivo solitario
 
Join Date: Jun 2009
Location: Arlington, VA
Bikes:
Posts: 8,703
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
Quote:
Originally Posted by guadzilla View Post
I find that I am consistently around 30W lower on the trainer than I am on the road - based on both testing and RPE.

Ironically, I've also noticed that the power reading on my Kurt Kinetic wired computer is about 30W higher than the PT (had posted a question about this here last year, actually), so I use more or less the same numbers on both my trainer and the road, and it works out ok.

I just tested my CP20 as 250W* (on the KK computer) on the trainer last week, just before starting my build phase - am going to test it on the road next weekend and I expect the numbers to be similar.

*Of course, for me that is only a measly ~3.5W/kg so excuse me while I go kill myself after seeing skinnyguy's numbers.
get in line: i hear it stretches around the block
echappist is offline   Reply With Quote
Old 09-03-11, 05:30 PM   #23
skinnyguy
Senior Member
Thread Starter
 
skinnyguy's Avatar
 
Join Date: Aug 2006
Location: Ontario, Canada
Bikes:
Posts: 249
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Yep View Post
Your hour on the trainer at FTP was pretty impressive. Makes me think your true FTP has got to be higher than that...

I think you are right. The ftp test was done inside and the other outside. Also on my ftp test i started out to hard and faded near the end so now when I redo my ftp test I will be able to pace myself since that was the first test I have done with a power meter.
skinnyguy is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 11:09 PM.