Stryd power conversion | 80/20 Endurance

Stryd power conversion

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  • #9508
    Sean
    Participant

    I have an existing 8020 Ironman plan for run pace and bike power. Have just bought a Stryd and was wondering if I can just use the pace zones in the plan and replace with Stryd power zones (realise they don’t have the X and Y zones)
    Thanks

    #9517
    David Warden
    Keymaster

    Sean,

    A couple of issues with mixing 80/20 zones and Stryd zones.

    First, Stryd does not quantify what “critical power” is. See https://support.stryd.com/hc/en-us/articles/360039261314-Critical-Power

    They define it as “the threshold at which the dominant type of fatigue your body experiences changes.” That’s not helpful in comparing intensity methods. I need some sort of Rosetta stone if I want to compare Stryd zones to 80/20 zones. Is it VT? LT? Anaerobic threshold? Aerobic threshold? CP30? CP20? Could be anything.

    Second, even if I could quantify what “threshold” means to Stryd, we may not then agree on what “easy” or “hard” means, or even what “Zone 2” means. Their Zone 2 might include some or all of Zone X, which would be a disaster is you spent a lot of time in Stryd Zone 2.

    In summary, no, they are not interchangeable at this time. My advice is to commit to one system or another for the best results. If you commit to Stryd’s intensity measures, you’ll do great. If you commit to 80/20, you’ll do great. If you try and combine them, there is some risk.

    David

    #9522
    Sean
    Participant

    Ok thanks David – so a little confused – what does your 80/20 run power bike power plan use if Stryd struggles in 8020

    #9524
    David Warden
    Keymaster

    I understood your question to be “I can just use the pace zones in the plan and replace with Stryd power zones.” I don’t know how to do that, since I don’t know what the Stryd Power zones are based on (what is Critical Power defined as to Stryd?) So no, you can’t replace 80/20 Pace Zone 2 with Stryd Power Zone 2 at this time. We don’t know the consequences.

    But, we can switch you to the Power and Power plan for free, and then you are using our Power zones directly, no conversion necessary. This is the best solution if you are using a Stryd device and an 80/20 plan. Just submit a Level Guarantee at https://www.8020endurance.com/contact/

    David

    #9526
    Sean
    Participant

    Thanks David

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