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07-10.-2007, 05:25 PM
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#1 |
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Registered User
Join Date: Jan 2006
Posts: 21
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FTP Value from 4x13min Test
Hi !
I usually do a L4 work once per week minimum. Because I like to do this on a hill I make 4x13min with a break (descent) for about 7min. I found no longer hill here to maximize the uphill time. My FTP is 260Watt. Last week I did this workout with following Watts. 1. 265 Watt 2. 270 Watt 3. 271 Watt 4. 272 Watt Do you think it is possible to predict the FTP from these values ? Thanks Chris |
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07-10.-2007, 09:53 PM
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#2 |
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Registered User
Join Date: Feb 2007
Location: Germany
Posts: 19
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Re: FTP Value from 4x13min Test
Just from that workout? Not in any useful accuracy, 205-272W would be a lazy safe guess. You could use the maximum 1 hour NP as lower bound, but I doubt that makes the range small enough to be useful.
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07-10.-2007, 10:05 PM
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#3 | |
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Registered User
Join Date: Oct 2004
Posts: 973
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Re: FTP Value from 4x13min Test
Quote:
Assuming the entire workout represented a maximal effort (as it should for FTP purposes), I'd have guessed something in the 250W range.
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rmur |
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09-10.-2007, 08:47 AM
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#4 | |
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Registered User
Join Date: Feb 2007
Posts: 72
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Re: FTP Value from 4x13min Test
Quote:
I assume this was the average for each effort. You could use an equation to estimate your FTP. It won't be exact, but neither is a 1 hour time trial if your only motivation is to test for FTP. It's standard practice to estimate FTP from a 30 min maximum effort by multiplying the 30 min average by .95. For a 13 minute effort, let's just go with a multiplication factor of between .92-.93. That gives us a range of 249-252 if we multiply by the power of the third interval (271). That sound reasonable enough? |
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09-10.-2007, 08:50 AM
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#5 | |
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Community Team
Join Date: Nov 2002
Location: Newport, South Wales
Posts: 3,831
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Re: FTP Value from 4x13min Test
Quote:
It shouldn't be. ric
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http://www.cyclecoach.com |
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09-10.-2007, 11:28 AM
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#6 | |
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Registered User
Join Date: Mar 2004
Posts: 88
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Re: FTP Value from 4x13min Test
Quote:
I think it is more standard to think of a 20 minute effort as being about 105% of threshold, at least I believe Mr. Coggan's thinks so ... |
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09-10.-2007, 11:50 AM
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#7 | |
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Registered User
Join Date: Mar 2006
Location: Sydney, Australia
Posts: 1,743
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Re: FTP Value from 4x13min Test
Quote:
http://groups.google.com/group/watt...01981e3bd5f2ef6 you may need to be a wattage member to view, I'm not sure. The use of a 20min test in the book is Hunter Allen's idea, not Andy Coggan's. This is not to say a 20 min test is useless - it is still a good marker of aerobic fitness. |
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09-10.-2007, 01:09 PM
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#8 | |
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Registered User
Join Date: Mar 2004
Posts: 88
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Re: FTP Value from 4x13min Test
Quote:
My bad -- that is the trouble with co-authored work  In any event, my point is that the idea of using .95 x 20 minute test is, though not accepted as the gold standard, has some merit |
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