Power Threshold?

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Power Threshold?

Postby jazclrint » Thu Jun 24, 2010 6:05 pm

I just won a month of free training with Intergate. He asked if I had a heart rate monitor. I told him better than that, I have a power meter! He then asked if I knew my power threshold. I don't. how do I use my iSport to figure that out?
Thanks,
Rich
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Re: Power Threshold?

Postby racerfern » Thu Jun 24, 2010 6:46 pm

Do the fitness test.
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Re: Power Threshold?

Postby jazclrint » Thu Jun 24, 2010 7:02 pm

And then what. The only number I got was 1.93 watts per kilogram.
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Re: Power Threshold?

Postby NCH1 » Thu Jun 24, 2010 7:13 pm

1.93 x your weight in kg= threshold power
If you only know your weight in pounds, divide this figure by 2.2 to get weight in kg.

To determine your power training levels [1}

Level 1: Active Recovery, less than 55% of FTP
Level 2: Endurance, 56-75% of FTP
Level 3: Tempo, 76-90% of FTP
Level 4: Threshold, 91-105% of FTP
Level 5: VO2 max, 106-120% of FTP
Level 6: Anaerobic Capacity, 121-150% of FTP
Level 7: Neuromuscular Power, more than 150% of FTP

[1] Coggan, Andrew Dr., Training and Racing with a Power Meter
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Re: Power Threshold?

Postby racerfern » Thu Jun 24, 2010 7:47 pm

Check the RACR screen, your FTP (threshold power) will have been set to the number you're looking for.

Here's how it works:
If you know your FTP you can manually punch it in and the w/kg and levels will automatically get set.

Or you can do the fitness test and in addition to the w/kg and levels, the actual FTP number gets set also. So the number you're looking for is in the unit already.
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Re: Power Threshold?

Postby jazclrint » Thu Jun 24, 2010 10:40 pm

I hate to disagree, but there is no numbers in the racer menu at all except Log hours and odometer mileage. I cannot find any ftp numbers anywhere in my unit. The only thing close is the w/kg. I did some digging, and ftp is not the w/kg*weight (in kg). You have to take that number and then multiply it by .95.
'98 ProFlex 5500c under construction
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Re: Power Threshold?

Postby racerfern » Thu Jun 24, 2010 11:44 pm

I have an iAero and when I enter RACR it goes next to Est Fric > TSS > FTP CFG
I don't know if the iSport has the same menu options but I thought it did. Check your reference manual.

Since the fitness test is 20 minutes long, the resulting FTP number is already adjusted by 5%, IIRC.

Anyways as NCH1 said, your 1.93 result x your weight in kg = FTP.
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Re: Power Threshold?

Postby jazclrint » Sat Jun 26, 2010 11:52 pm

racerfern wrote:I have an iAero and when I enter RACR it goes next to Est Fric > TSS > FTP CFG
I don't know if the iSport has the same menu options but I thought it did. Check your reference manual.

Since the fitness test is 20 minutes long, the resulting FTP number is already adjusted by 5%, IIRC.

Anyways as NCH1 said, your 1.93 result x your weight in kg = FTP.


My iSport does not have the "FTP CFG" option.

This is according to the April instructions:

" If an iBike Fitness Test is performed then FTP = Average watts from 20 minute test * 0.95"
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Re: Power Threshold?

Postby racerfern » Sun Jun 27, 2010 12:43 am

OK, so what did you calculate your FTP to be? You should still be able to come up with a number for your coach.
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Re: Power Threshold?

Postby NCH1 » Sun Jun 27, 2010 5:08 am

"My iSport does not have the "FTP CFG" option"

in the racer menu when you get to hours log click the down button and it will go into the Ftp Config.

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Re: Power Threshold?

Postby jazclrint » Mon Jun 28, 2010 4:19 pm

racerfern wrote:OK, so what did you calculate your FTP to be? You should still be able to come up with a number for your coach.


I did a new fit test since the last one was 3 months old. I got a rating of 1.56. So 1.56w/kg*100kg*.95 = 148 ftp.

I apologize for wasting your guys time. I normally would have dug around in the forums more, but they are expansive, and I felt I needed an answer quickly. But as you can see, I did eventually.
'98 ProFlex 5500c under construction
'13 Schwinn Fastback custom build
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'13 Reline Metro Sport custom build
'15 GT Sensor Carbon Pro custom build
'?? A bike who's existence shall not be acknowledged
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Re: Power Threshold?

Postby jazclrint » Mon Jun 28, 2010 4:21 pm

NCH1 wrote:"My iSport does not have the "FTP CFG" option"

in the racer menu when you get to hours log click the down button and it will go into the Ftp Config.

Nik



You are the MAN!!! I found it in 2 seconds thanks to you. ftp = 150
'98 ProFlex 5500c under construction
'13 Schwinn Fastback custom build
'05 Bianchi Axis custom build
'13 Reline Metro Sport custom build
'15 GT Sensor Carbon Pro custom build
'?? A bike who's existence shall not be acknowledged
jazclrint
 
Posts: 153
Joined: Thu Feb 25, 2010 9:05 pm

Re: Power Threshold?

Postby racerfern » Mon Jun 28, 2010 8:34 pm

jazclrint wrote: I did a new fit test since the last one was 3 months old. I got a rating of 1.56. So 1.56w/kg*100kg*.95 = 148 ftp.

I apologize for wasting your guys time. I normally would have dug around in the forums more, but they are expansive, and I felt I needed an answer quickly. But as you can see, I did eventually.


Excellent! Can we go back to riding our bikes and trying to raise w/kg? After all that's the real important number because there are two factors, power and weight.
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Re: Power Threshold?

Postby jazclrint » Mon Jun 28, 2010 10:07 pm

Can you? I never stopped. Although, at this point the realization is that I really just need to drop weight, so I'm going to ignore that number for now and just make sure I don't over train.
'98 ProFlex 5500c under construction
'13 Schwinn Fastback custom build
'05 Bianchi Axis custom build
'13 Reline Metro Sport custom build
'15 GT Sensor Carbon Pro custom build
'?? A bike who's existence shall not be acknowledged
jazclrint
 
Posts: 153
Joined: Thu Feb 25, 2010 9:05 pm


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