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.

PSUcycling said:

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?)

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.

frenchyge said:

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.

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?

Spunout said:

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?

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. 🙂

Useful info:
midweekclub.capowerFAQ.htmOpen ↗

Don't take the regression too seriously, though -- if you do, you might be tempted to pop up to 11km.

Dan

PSUcycling said:

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!

What's your w/kg at sea level? How much did said 16 y/o beat you by?

whoawhoa said:

What's your w/kg at sea level? How much did said 16 y/o beat you by?

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)

Spunout said:

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?

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?

PSUcycling said:

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?

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.

PSUcycling said:

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?

Say you just want a different FTP (300, normal= 325) for last weekend:
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

PSUcycling said:

taylor phinney (you may recognize the last name, his mom was an olympic athlete too)

At the 1984 Olympics in Los Angeles, Connie Carpenter won the inaugural women's road race - a very young Rebecca Twigg was second.

PSUcycling said:

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.

In fact, the first tie breaker was sum of stage placings, which Brad had him on narrowly. The second tie breaker would have been final day placing, which Brad would have had as well.

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.

jbvcoaching said:

In fact, the first tie breaker was sum of stage placings, which Brad had him on narrowly. The second tie breaker would have been final day placing, which Brad would have had as well.

Any idea why they didn't have fractional seconds for the TT, or did they just choose not to use it?

asgelle said:

Any idea why they didn't have fractional seconds for the TT, or did they just choose not to use it?

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.

asgelle said:

Any idea why they didn't have fractional seconds for the TT, or did they just choose not to use it?

I'm not sure whether or not they had fractional seconds for any of the stages, but I'm fairly sure they were all hand timed...meaning rounding to the nearest second was likely appropriate.