Power and pace conflicts with Stryd | 80/20 Endurance

Power and pace conflicts with Stryd

Viewing 9 posts - 1 through 9 (of 9 total)
  • Author
    Posts
  • #15913
    maroda
    Participant

    Hello! I’m new to running with a Stryd power meter (2 weeks). I did a 20 minute test and used the 80/20 zone calculators to find my threshold power (296 watts) and threshold pace (8:52) values. It seems like my Z4 power and Z4 pace conflict with one another.

    Last week during my RSP9 workout, I ran eight one-minute sprints at Z4 power (305-355 watts). My pace ranged from 6:04-6:14 mins/mile. But based on my running threshold zones (calculated from the same 20-minute test), my Z4 pace should be 7:43-8:42 per mile. I’m concerned that I’m overexerting myself trying to run in my Z4 power range. Any thoughts, suggestions, advice?

    #15914
    MatCat
    Participant

    following this as I posted a very similar question here yesterday

    #15915
    maroda
    Participant

    Edit: My power averages for eight one-minute sprints at Z4 power were from 301-309 watts, so I was barely hanging on!

    #15916
    David Warden
    Keymaster

    M,

    There is a device calibration issue here. Just look at the data at hand.

    Workout 1: 296 watts equals 8:52 pace
    Workout 2: 305 watts (9 watts higher) equals 6:14 pace (2:38 faster)

    That’s a 3% increase in power leading to a 42% increase in speed. It’s not possible.

    In other words, forget zones altogether, pretend zones don’t exist. You can’t get a 42% increase in speed from a 3% increase in power. The data in either Workout 1 or Workout 2 is wrong.

    David

    #15923
    maroda
    Participant

    Thanks for your reply, David! If it’s a potential device calibration issue, should I reset my Stryd and redo the 20-minute test? I made sure that the firmware was updated before using it. I’ve included my file for the run test.

    https://home.trainingpeaks.com/athlete/workout/YNGJSH56LAUZVTI4FEYTRMETSU

    #15924
    MatCat
    Participant

    @maroda – make sure you did not change your weight in Stryd settings. You should never change it, otherwise all the W calculations go south.

    #15926
    David Warden
    Keymaster

    @MatCat is right on, that’s one possibility. We had an interesting thread here where an athlete’s power data was just all over the place. Turns out their Bluetooth scale was sending weight data to Stryd and updating it constantly.

    My next response was going to be…”you can really only compare Pace and Power when running outside on a track…” and do a mic drop and end the thread. But, then I checked your run data and… it was done outdoor on a track. Dang it. That eliminates a lot of issues. I’m not familiar enough with Stryd to determine calibration settings.

    Frankly. I’d take this straight back to Stryd and let them try to explain it. “How can I get a 42% increase in speed with a 3% increase in power?”

    David

    #15927
    maroda
    Participant
    #15928
    maroda
    Participant

    Thank you, @MatCat and David. I *may* have messed with my weight setting in the Stryd app, between those two runs. I’m going to just retest and hope that it solves the issue. I’ll report back any additional findings or conclusions.

Viewing 9 posts - 1 through 9 (of 9 total)
  • You must be logged in to reply to this topic.

You have races.

We have plans.

 

 

- Access to all 80/20 plans

- TrainingPeaks Premium

- Workout Library

- 80/20 Endurance Book

 

30 day money back guarentee

Unlock your full potential

with our subscriptions