Thoughts on VI<1

tscroggi

A couple guys in the JOS have been looking at power numbers (me included) and noticed that since my new FTP test that I regularly have VI<1.  Typically it will be .99.  </p>

The mathematics are easy: VI=NP/AP.  Indeed looking at the output my AP is > than NP.

Some of the JOS crew thought it was impossible to have AP>NP.  I'm curious on thoughts about what this VI<1 means?  Is it good?  Is it bad?  "It is what it is..." <-- favorite quote.  Did something goofy happen in algorithms when I went from WKO+ 2.2 to 3.0???</p>

Here is a cut and paste of an interval:

8' #2:

    Duration:      8:01

    Work:          112 kJ

    TSS:           13.5 (intensity factor 1.005)

    Norm Power:    232

    VI:            0.99

    Pw:HR:          4.43%

    Pa:HR:          4.1%

    Distance:      2.766 mi

        Min    Max    Avg

    Power:           193    276    234     watts

    Heart Rate:      145    177    171     bpm

    Cadence:         81    87    84     rpm

    Speed:           20    21.6    20.7     mph

    Pace             2:46    2:60    2:54     min/mi

    Hub Torque:      6    9    7     lb-in

    Crank Torque:    194    274    234     lb-in

 

Thanks!

gilliatt

Yep they changed something slightly, it only happens on shorter sets 8-10 minutes. I put a thread on it a few weeks ago when I was seeing as I was also curious.