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    Training & Nutrition

    Intervals.icu Announces Zwift Training API Integration

    Eric Schlange
    By Eric Schlange
    December 12, 2024
    LAST UPDATED December 12, 2024
    19

    This week Intervals.icu and Zwift announced a new level of integration via Zwift’s new Training API. Now it’s easier than ever to execute the workouts found in Intervals.icu’s workout library directly in Zwift while also automatically sending your Zwift activities back to Intervals.icu for processing and incredibly powerful charting.

    Read about Zwift integration on the Intervals.icu forum >

    About Intervals.icu

    “Easy to use analytics and planning for athletes and coaches.” That’s how Intervals.icu describes itself. Although the service has been around for 6+ years (launched in mid-2018), it’s not as well-known as the bigger services because it’s been a part-time project of London-based founder David Tinker.

    But David has built something very powerful in Intervals.icu, turning it into perhaps the best-kept secret in the world of cycling data analysis. And when I sat down to chat with David a couple of weeks ago, I learned that he went full-time with Intervals.icu back in September, which means we’ll be seeing even more cool feature releases soon!

    I’ve actually been a paying Intervals.icu supporter for a few years, because 1) it’s cheap (free, actually, although I support the site for $4/month) and 2) fellow racers on my DIRT squad love to compare power charts and talk about how our “weebles” (W’) got used up in a race. But as David walked me through his platform’s capabilities during our call, I realized I really hadn’t spent much time exploring all it could do!

    I won’t detail all of Intervals.icu’s features here, but here are some favorites that relate to this Zwift integration:

    • Easy Workout Builder: create workouts in seconds using a simple text-based editor (see how it works), or drag an existing ride into your workout library to create an interval-based workout based on that ride’s power chart.
    • Workout Library: organize your own workout library and access the community’s workout library with piles of free workouts and training plans available.
    • Planner: plan your upcoming workouts, or give your coach access to put workouts on your calendar.
    • Charts, charts, and more charts: Intervals.icu lets you graph just about anything, and this is probably what most riders love about it! It’s not quite as powerful as the WKO software used by many coaches, but it’s easy to use and much more affordable.
    Workout created based on outdoor ride
    My overall fitness chart
    Activity calendar and planner
    Chart from a recent Zwift race

    Pricing and Signup

    Intervals.icu is the first service integrated with Zwift’s Training API that is free to use, so that’s worth mentioning! But also, you can support the project with a $4/month subscription (billed every 3 months to keep processing costs down) if you choose.

    The service hosts accounts for over 100,000 athletes who have used it to analyze over 111 million activities since launch, so there are some real ongoing costs in terms of storage and data processing. That’s why I and others choose to support David’s work.

    Connecting Intervals.icu + Zwift

    All of your interaction with Intervals.icu is done via the website. Visit the site, create your account, then connect it to Zwift via the Settings page:

    Screenshot 2024-12-04 at 14.07.01
    Screenshot 2024-12-04 at 14.06.39

    Choosing Your Training Plan/Workout

    Any workouts you put into the Intervals.icu planner will be automatically uploaded to Zwift. In fact, the next week’s worth of workouts are automatically loaded to Zwift, and you’ll see your workout for today on the home page:

    You can also go to Workouts → Custom and select “Intervals.icu” to see what is coming up:

    Complete List of Training API Partners

    Intervals.icu is just the latest to be added to the growing list of Training API partners at Zwift. Here’s the complete list, which will be updated as new partners are added:

    • Best Bike Split
    • FasCat/CoachCat
    • Final Surge
    • Intervals.icu
    • JOIN
    • TrainerRoad
    • TriDot
    • Wahoo SYSTM
    • XERT

    Questions or Comments?

    Have you trained using workouts from Intervals.icu app? Use their amazing charts or workout builder? Share any related comments or questions below…

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      Eric Schlange
      Eric Schlangehttp://www.zwiftinsider.com
      Eric runs Zwift Insider in his spare time when he isn't on the bike or managing various business interests. He lives in Northern California with his beautiful wife, two kids and dog. Follow on Strava

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