Poll: What's your 40K TT / FTP ratio (was FTP)

Discussion in 'Power Training' started by yzfrr11, May 3, 2006.

  1. yzfrr11

    yzfrr11 New Member

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    JBV is obviously a highly experienced timetrialist. Along those lines, my feeling is that, given similar drag coefficient, it is the rider's FTP that will determine a 40k result for a flat course. Perhaps a bulky rider will find it more difficult to achieve a low coefficient due to flexibility rather than frontal area issues.

    Nevertheless, it would be interesting (fun) to compare 2 values:

    1) 40K TT / FTP ratio
    2) 40K TT / FTP / Kg ratio

     
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  2. scotmart

    scotmart New Member

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    Comparing people's times on different courses is pretty worthless. Even if they are dead flat, there can be huge differences, and not just due to the obvious air density (altitude/weather/temp) differences, but also wind, and 'course particulars'.

    A while back there was this discussion about 25 times, and this guy from the UK couldn't understand why everyone's times were so slow. He gave several examples of people doing 50-51 minute 25's on flat courses with 300 or so watts. In the end it finally came out that like many TT's in the UK, the one he was giving times for was run adjacent to a motorway with heacy truck traffic. That alone can be worth 2-3mph (or 3-5 minutes over a 25 miler...).

    But even that aside, there is likely to be huge differences in CdA for a given body weight. Due not only to people's different tolerance for getting aero, but also how much effort they have put into getting aero.

    Even on the same course it's a bit sketchy. Ask Lance what he thinks about comparing times on the same course (if you correct for the wind difference, he beat Zabriski by a good margin last July).

    I'd stick with what JV was getting at. Don't worry about what other people are doing, you know how much power you can make, work on getting the most out of it =).

    Scott
     
  3. esandman

    esandman New Member

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    As a big guy who's not really a sprinter the advantage on flat time trials is all I have. Although it's not the only factor (as suggested) I'd like to think there is some advantage to being able to produce ample power when I don't have to battle constant acceleration or gravity and when no one can draft off me.

    Erik
     
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