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Sport Specific Strength Training for Endurance Athletes

Mobility. Stability. Strength. ECFit Boulder is a sport-specific approach to strength training designed to support & complement high-volume endurance sessions. With a focus on core elements of functional movement, the ECFit coaches work with many of the world’s best triathletes, cyclists, and runners every day from home base in Boulder, CO. These athletes do the kind of work in the gym that allows them to train harder, longer, and without injury, then show up at the starting line ready to be competitive at the highest level.

Train Like the Pro’s with ECFIT Mobile App

We will take you on an authentic & effective journey of strength training that allows you to train just like the pros – but from home. The app includes videos of every exercise, suggested amount of sets, repetitions, weight and rest intervals – everything you need to prepare your body for the rigors of endurance training.


Download the ECFit Strength mobile application, available for iOS and on Google Play.


Purchase your program using the same email address that you use to log into the app. It may take up to 24 hours for your purchased program to load.


Each program comes with a PDF that has complete instructions on how, when, how much, & how often.


With consistent effort you will find that you feel better & move better in training. You’ll be able to train harder, recover faster, and perform at a higher level in competition.

What Our Athletes are Saying

Erin Carson’s strength training system is unlike anything I have ever done before. Doing these exercises twice a week allows my coach to push me even harder in swim, bike, and run disciplines. It is great for injury prevention and gives my body the balance that training for triathlons takes away from it.

Mirinda Carfrae
World Champion Triathlete

Since I started working with Erin in 2014, I feel like a completely different athlete. I’m more stable and powerful, and can back up multiple hard training sessions without breaking down. Erin’s program is specific for endurance training, and her periodization into different phases of the year allows me to improve throughout each season.

Paula Findlay
Olympian and World Champion

Committing to ECFIT strength and conditioning over the last two years has helped my performance more than I could have expected! The gym work we do is one of the most valuable sessions of my week. Keeping on top of things in the gym has helped me stay injury-free and race consistently at a high level.

Flora Duffy
4x XTerra World Champion

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