running heart rate drift test : Power or pace

  • Creator
  • #47801

    Hi all!

    I did a AeT test today with the heart rate drift test, but unfortunately the Pace/HR ratio is completely different than the Power/HR ratio. As I did the test on the flatest route that I can get here which is still a bit rolling, I tried to calculate the NP/HR ratio. Power was calculated with the garmin running dynamics pod.

    When I uploaded the training on TP, it gives me a Pa:HR ratio of 6.27%.
    But when I look at the power, here are the results : 1st half 159bpm NP : 331 / 2nd half 159bpm NP : 330. Which would give me a 0,01% NP:HR ratio..

    Any thoughts on which one of there ratios should I trust more ? And how come there is such a huge difference between both ?

    Here is the file if someone is interested.

    Thanks for the insights!

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  • Participant
    Dada on #47867


    Anonymous on #47915

    My take on running power meters is this: If you train on flat ground and you calibrate the meter at a track then you have a tool that an help you in your training for road or track races. But as soon as you introduce hills, especially steep ones, in my personal testing and that of several of the athletes I coach we’ve found them to be useless.

    I can’t explain the difference you are seeing between these two methods. We have seen very good correlation between the HR drift test and gas exchange test. That is why we recommend this test for mountain athletes and we do not recommend the use of power meters for mountain athletes.


    Anonymous on #48047

    As a related note, I have no idea why running power meters were even invented for flat running.

    Even if they were a direct measurement of output (rather than an algorithm) why measure something one step away from what governs performance for a road runner? (Pace.)

    Power makes sense for cycling because the speeds are so variable and power can be measured directly. But for flat running, pace seems to make much more sense.

    Where running power meters would be a huge help is in mountain sports. But the development priority of these companies seems to be reinventing the wheel rather than filling a genuine need.


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