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80/20 Endurance

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Training science, coaching, and the 80/20 method — from Matt Fitzgerald and the 80/20 Endurance coaching team.

  • The Livelihood Mindset Vs. the Hobby Mindset

    Running is a hobby for the vast majority of runners. Only for a tiny fraction of the runner population is the sport a livelihood. Because the pros depend on their race performances to put food on the table, they typically do everything in their power to maximize their performance. This no-stone-unturned approach to running is…

    Matt Fitzgerald ·

  • Why Your Easy Run Paces Should Be Wildly Erratic

    Easy runs get no love. Whenever a video is made of elite runners in training, it’s always some type of workout that’s filmed (a track session, hill repetitions, a long run at marathon pace), never an easy run. This is the case despite the fact that easy runs are the foundation of any good training…

    Matt Fitzgerald ·

  • Letters to the Coaches: Creating a Level 4 Plan

    Hello David, Hope you are well. I purchased the 80/20 level three plan back in June and used it to train for my first marathon. I loved it! It helped me to a 3:24 in NYC. I am looking to shave some time off and am running my second in March. I know there is…

    Matt Fitzgerald ·

  • Why Don’t 4-Hour Marathoners Train Like 3-Hour Marathoners?

    A friend of mine ran the California International Marathon recently. CIM is known for producing more Boston Marathon qualifiers (relative to field size) than any marathon other than Boston itself, and indeed my friend’s goal was to BQ. As a 40-year-old male, he needed to finish in 3:12, give or take, to claim a slot.…

    Matt Fitzgerald ·

  • Letters to the Coaches: Daily Workout Order

    David, I sometimes have to do the workout for a particular day in a different order than specified in the plan. For example, today calls for a swim, then a run. Due to my schedule today I need to do the run and then the swim. How big a deal is that? I know some…

    Matt Fitzgerald ·

  • Letters to the Coaches: Alignment of Power Zones and 80/20 Heart Rate

    David, I am pushing through first weeks with Garmin + Stryd to track it. I noticed that my power zone 2 running results in running in HR zone X calculated on your calculator for threshold HR delivered by my Garmin fenix 5. Would it be a clear sign that I overstated my threshold Power? Is…

    Matt Fitzgerald ·

  • Become a Better Pacer with These Simple Games

    Pacing is the art of getting to the finish line of a race in the least amount of time possible given the current state of your body (fitness and fatigue levels, etc.) and external conditions. Generally, this requires that you distribute your effort quite evenly throughout the race and that this evenly distributed effort leave…

    Matt Fitzgerald ·

  • Letters to the Coaches: When and How to Test Zones

    Dear David W, I’m going to buy your plan for the level 3 half marathon plan. I have a race (in Madrid, Spain) on April 8 which by my calculations will have me starting Dec 31/Jan 1… I had a bike wreck in a triathlon a few months ago that resulted in broken bones, concussion,…

    Matt Fitzgerald ·

  • Think a Low Carb, High Fat Diet (LCHF) Might Help Your Running? Think Again!

    One of the hottest areas of research in exercise science lately concerns the effects of low-carbohydrate, high-fat (LCHF) diets on endurance athletes. The latest addition to the literature on this subject comes from a study led by A.J. Heatherly at Middle Tennessee State University and published in Medicine & Science in Sports & Exercise. Eight…

    Matt Fitzgerald ·

  • Letters to the Coaches: Frequency of Hard and Easy Workouts

    Hi Matt, I just finished reading your book 80/20 Running. I liked the basic idea and I also have experienced my biggest fitness gains with mostly slow exercising. But I have one question that I did not find an answer – but maybe there was.. As a triathlete I currently do hard and slow workouts…

    Matt Fitzgerald ·