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07-05.-2007, 04:22 PM
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#1 |
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Registered User
Join Date: Nov 2003
Location: northern, mexico - texas
Posts: 170
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changing FTP per Elevation?
i'm driving back from the tour of the Gila and I was thinking that My TSS for each stage is going to be quite a bit off.
I was able to determine that my FTP @ Gila was around 305, which was generall between 6-7k feet above sea level. I live right at sea level, and there my FTP is 325-330. my question is, can i manually change what CPs thinks my FTP is only for specific files? I know my TSS is off, and consequently my CTL, TSB etc... I know there is a TSS override (which i haven't used yet). Even with that feature I wouldn't know what number to use...( maybe the % difference between different FTPs?) thanks btw, a 16 y/o kicked our butts this weekend! |
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07-05.-2007, 09:24 PM
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#2 |
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Registered User
Join Date: Mar 2007
Posts: 107
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Re: changing FTP per Elevation?
From what I've read over the years, I think you can expect a 15% decrease in performace at altitude..if you train/live at sea level. I'm curious to hear if that's what your results are. I'll be riding in Colorado in July at 7500 to 11500 ft and was wondering the same.
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07-05.-2007, 10:11 PM
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#3 | |
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Registered User
Join Date: Apr 2005
Location: Kansas City, USA
Posts: 3,691
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Re: changing FTP per Elevation?
Quote:
Ride TSS equals IF^2 times the ride duration in hours. Calculate the modified ride IF using the Gila FTP and then you can override the TSS values using the altitude-modified TSS for the ride. |
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07-05.-2007, 11:19 PM
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#4 | |
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Registered User
Join Date: Sep 2005
Posts: 639
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Re: changing FTP per Elevation?
Quote:
Just re-calculate your FT and zones for the period where the race files will be in WKO. Change it back for the files when you return. Wouldn't this update TSS automatically? |
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08-05.-2007, 03:38 AM
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#5 | |
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Registered User
Join Date: Apr 2005
Location: Kansas City, USA
Posts: 3,691
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Re: changing FTP per Elevation?
Quote:
Yeah, I image it would work to just drop FTP for that week/weekend and then put it back up for the next week. Good idea.  |
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08-05.-2007, 04:51 AM
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#6 |
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Registered User
Join Date: Apr 2007
Posts: 92
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Re: changing FTP per Elevation?
Useful info:
http://www.midweekclub.ca/powerFAQ.htm#Q17 Don't take the regression too seriously, though -- if you do, you might be tempted to pop up to 11km. Dan |
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08-05.-2007, 04:52 AM
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#7 | |
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Registered User
Join Date: Oct 2004
Posts: 1,019
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Re: changing FTP per Elevation?
Quote:
What's your w/kg at sea level? How much did said 16 y/o beat you by? |
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08-05.-2007, 05:22 AM
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#8 | |
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Registered User
Join Date: Nov 2003
Location: northern, mexico - texas
Posts: 170
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Re: changing FTP per Elevation?
Quote:
4.85w/kg he was leading GC most of the week, he lost the jerzey on the last day when another rider tied him (GC time) but gave the other rider the overall due to winning the last stage. btw, the 16y/o...taylor phinney (you may recognize the last name, his mom was an olympic athlete too) |
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08-05.-2007, 05:23 AM
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#9 | |
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Registered User
Join Date: Nov 2003
Location: northern, mexico - texas
Posts: 170
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Re: changing FTP per Elevation?
Quote:
you can only change your FTP setting on the athlete home page, correct? doesnt' it recalculate all of the charts, irregardless of when you put the number in? |
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08-05.-2007, 05:42 AM
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#10 | |
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Registered User
Join Date: Apr 2005
Location: Kansas City, USA
Posts: 3,691
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Re: changing FTP per Elevation?
Quote:
When you enter a new FTP number, you also enter a starting date when that FTP takes effect. So, you could change your FTP down to 305w beginning the day you left for Gila, and then change it again to 325w beginning the day you got home. When WKO+ calculates all the charts, it uses the FTP that is in effect for the day of each workout, so the higher elevation FTP would only affect the workouts you did while at Gila. |
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08-05.-2007, 05:49 AM
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#11 | |
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Registered User
Join Date: May 2006
Location: Mundelein, IL
Posts: 145
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Re: changing FTP per Elevation?
Quote:
Athlete Home Page Options>New Zones Date to 5/5/2007 Type in 300 for Threashold Watts Options>Calculate Power Zones>Coggen Power Levels (or whichever you use) Also update HR if you use it Options>New Zones Date= 5/7/2007 Threashold Power= 300 watts Options>Calculate Power Zones>Coggen Power Levels (or whichever you use) Also update HR if you use it TF |
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08-05.-2007, 06:05 AM
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#12 | |
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Registered User
Join Date: Jul 2003
Posts: 2,622
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Re: changing FTP per Elevation?
Quote:
At the 1984 Olympics in Los Angeles, Connie Carpenter won the inaugural women's road race - a very young Rebecca Twigg was second. |
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08-05.-2007, 12:47 PM
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#13 | |
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Registered User
Join Date: Dec 2005
Posts: 205
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Re: changing FTP per Elevation?
Quote:
Taylor was a bit disappointed, but of course he's going to win a lot more races than he already has. Certainly no shame in this particular 16yo kicking your collective butts. |
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09-05.-2007, 02:22 AM
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#14 | |
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Registered User
Join Date: Feb 2004
Posts: 100
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Re: changing FTP per Elevation?
Quote:
Any idea why they didn't have fractional seconds for the TT, or did they just choose not to use it? |
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09-05.-2007, 02:45 AM
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#15 | |
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Registered User
Join Date: Nov 2003
Location: northern, mexico - texas
Posts: 170
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Re: changing FTP per Elevation?
Quote:
dont' know. my guess is that they were recorded, but not logged as they probably didn't need them. i bet they could go back and check if needed though. |
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