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  1. #1
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    What is VT1 and VT2 using CTS training zones?

    I do the 8 minute CTS field test, using the power meter on my Tacx trainer to set my zones. (According to CTS, that test results in a reading 10% above LT.) Anyone know how that correlates to the VT1 & 2, as mentioned in the "zone 2" thread? From what understand it seems the VT2 is about LT. But does the VT1 include some of the lower end "endurance" zone, or is it mainly recovery pace?

  2. #2
    just another gosling Carbonfiberboy's Avatar
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    I know where it is for me, using HR, but I don't know where it is for you, using power. It's ventilatory, thus related to your breathing. For me, it varies vs. HR from day to day and from ride to ride, indoors to outdoors, etc. When you can recite the alphabet out loud in one breath without straining or breathing hard afterward, you're below VT1. When you exceed it, you'll notice a fairly rapid increase in your breathing rate. Try it and report back vs. your FTP.

  3. #3
    Hardening the F up
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    Quote Originally Posted by pakossa View Post
    I do the 8 minute CTS field test, using the power meter on my Tacx trainer to set my zones. (According to CTS, that test results in a reading 10% above LT.) Anyone know how that correlates to the VT1 & 2, as mentioned in the "zone 2" thread? From what understand it seems the VT2 is about LT. But does the VT1 include some of the lower end "endurance" zone, or is it mainly recovery pace?
    VT1 is going to be around 70 - 75% of FTP.

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    Quote Originally Posted by no sweat View Post
    VT1 is going to be around 70 - 75% of FTP.
    Any idea what FTP would be in relation to the CTS test? (Isn't FTP a bit below LT?)

  5. #5
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    Quote Originally Posted by pakossa View Post
    Any idea what FTP would be in relation to the CTS test? (Isn't FTP a bit below LT?)
    FTP is roughly equal to your power at LT. Physiologists might quibble, and I'm happy to let them.

    Averaging last 20 minutes of a 30 minute time trial is a better FTP test (no correction factor). You can probably hold that power for one hour, with sufficient motivation.

  6. #6
    just another gosling Carbonfiberboy's Avatar
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    Doesn't Carmichael say take 90% of your field test result for FTP? Or is it 95% for power? I don't remember or feel like looking it up.

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    Hardening the F up
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    Quote Originally Posted by Carbonfiberboy View Post
    Doesn't Carmichael say take 90% of your field test result for FTP? Or is it 95% for power? I don't remember or feel like looking it up.
    I think it's 95% of a 20 minute TT. I find the "last 20 of a 30 minute TT" more reliable. I've done both, the numbers make sense, but it's "easier" (if that's the right word...) to get my pacing right on the 10 + 20. And it's all about pacing (and being rested, and nourished, and hydrated, and fired up).

  8. #8
    just another gosling Carbonfiberboy's Avatar
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    The CTS field test is 2 reps of 8' with a couple minutes rest between.

  9. #9
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    Quote Originally Posted by Carbonfiberboy View Post
    The CTS field test is 2 reps of 8' with a couple minutes rest between.
    I was thinking of someone else's test then. I think drawing hour long conclusions based on 8' intervals is a bit of a stretch, myself.

  10. #10
    just another gosling Carbonfiberboy's Avatar
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    Quote Originally Posted by no sweat View Post
    I was thinking of someone else's test then. I think drawing hour long conclusions based on 8' intervals is a bit of a stretch, myself.
    Chris Carmichael of CTS (Carmichael Training Systems) has had a lot of clients, including of course LA, and a lot of time to investigate. His opinion, laid out in his Time Crunched book, is that there are so many variables involved, no matter how you do it, that the best thing is to take as little out of the athlete as possible when measuring. It's just a number, after all.

    My interest piqued, I looked it up. Chris believes, after evaluating thousands of power files, that the CTS field test power result should be multiplied by .9 to get FTP, whereas Coggan as you mention, multiplies his 20 minute test by .95 to get FTP. I misremembered the spacing between the CTS test intervals: it's 10 minutes.

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    My last CTS test was 350W. This gives an FTP/LT of 315. Looking back, I DID do a 20 min FTP test a year ago. That gave me a 290W FTP, according to that method. (Guess I should re-due that one.) Should I use 75% of 315 (236W) or 290 (218W)? (Or, make it easy and use 300?) Tried saying the ABC's. Started at 230W, breathed just a bit hard afterwards; tried 220W and 200W, seemed almost the same as 230W. (Tried 240W, that became a little more noticeable.)

  12. #12
    just another gosling Carbonfiberboy's Avatar
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    Quote Originally Posted by pakossa View Post
    My last CTS test was 350W. This gives an FTP/LT of 315. Looking back, I DID do a 20 min FTP test a year ago. That gave me a 290W FTP, according to that method. (Guess I should re-due that one.) Should I use 75% of 315 (236W) or 290 (218W)? (Or, make it easy and use 300?) Tried saying the ABC's. Started at 230W, breathed just a bit hard afterwards; tried 220W and 200W, seemed almost the same as 230W. (Tried 240W, that became a little more noticeable.)
    IMO the idea isn't to push the roof of that zone, but rather to put in as much time as possible with little cost. I'd say 220.

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