
Get the 80/20 Endurance Advantage!
Featuring the proven 80/20 intensity balance described in Matt Fitzgerald's bestselling book 80/20 Running, this Ultra 100 Mile Level 0 training plan will provide you with the same workout structure used by the most successful runners in the world.
Who is this plan for?
This plan is intended for athletes without a running background attempting their first Ultra event. You should be able to comfortably run continuously for at least 90 minutes before you start the plan.

How Do I Measure My Intensity?
This plan presents each workout's intensity target by Heart Rate but Pace and Power versions of this plan are also available. Each workout can be exported to a supported device, which will automatically guide you through the session with duration, lap, and intensity prompts. See our Structured Workout page for more information.

Do You Have a Guarantee?
Not sure which level is right for you? Review our Level Comparison Charts to find the best fit. There’s zero risk: Our Level Guarantee allows you to switch to a different level or intensity type within the same distance if you discover that the plan you’ve selected is too hard or too easy. Review our Level Comparison Chart to see what level is right for you.

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80/20 Endurance is the creation of Matt Fitzgerald and David Warden. Based on the breakthrough books 80/20 Running and 80/20 Triathlon, runners, triathletes, and other endurance athletes improve the most when they consistently do 80 percent of their training at low intensity and the other 20 percent high intensity. The typical endurance athlete spends only 50-70 percent their total training time at low intensity. The solution? An 80/20 training plan that ensures the optimal intensity balance.