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Author profile image

Malcolm Dunn

Previous REI Experiences national operations coordinator

Malcolm Dunn, previously an REI Experiences national operations coordinator, has master's degrees in kinesiology and exercise sport studies, and coached collegiate endurance athletes in running, Nordic skiing, and cycling for many years. He has run dozens of trail races, ranging from half-marathons to ultramarathons–and loves to spend a lot of time outdoors in Zone 1 and 2!

Latest Articles

  • Skills

    How to Train Using Heart Rate Zones

    194 reviews with an average rating of 4.0 out of 5 stars

    Learn how to train using a heart rate monitor, what your HR max is and how to determine it, and how to calculate and use heart rate training zones.

  • Skills

    What is VO2 Max?

    3 reviews with an average rating of 4.0 out of 5 stars

    Does a high VO2 max mean you’re in shape? We explain what VO2 max indicates and how to improve your VO2 max score through aerobic exercise. 

  • Skills

    5K and 10K Trail Run Training Plans

    56 reviews with an average rating of 4.1 out of 5 stars

    This article offers advice and tips to prepare you to run a 5K or 10K trail race; also includes a sample training plan and exercises.

  • Skills

    10K Road Run Training Plan for All Levels

    25 reviews with an average rating of 3.8 out of 5 stars

    Get advice and tips to prepare you to run a 10K road race event. Before you know it, you'll be ready to run 6.2 miles!

  • Skills

    5K Training Plan for Beginners

    38 reviews with an average rating of 3.8 out of 5 stars

    Learn how to run a 5K, whether you're a beginner or a seasoned runner, at REI. We have tips to help you run the distance, and maybe even enjoy it.

  • Skills

    Tips for Your First Ultramarathon Trail Race

    46 reviews with an average rating of 4.6 out of 5 stars

    Learn how to select and prepare for your first trail ultramarathon, with tips on nutrition, hydration, mental and physical prep and more.

  • Skills

    How to Measure and Improve Your VO2 Max

    579 reviews with an average rating of 4.0 out of 5 stars

    Learn what VO2 max is, how you can measure it and why it’s key to improving fitness. Also get tips on training routines that can help you improve it.

  • Skills

    Half Marathon and Marathon Trail Run Training Plans

    134 reviews with an average rating of 4.6 out of 5 stars

    Set yourself up for success in a half marathon or marathon trail-running race with our advice, training plans and specific exercises.