Sign up for ECFit updates and receive one week FREE training.

Strength Training for Endurance Athletes

ECFIT offers strength training for endurance athletes designed to complement high-volume endurance workouts. With a focus on core elements of functional movement, our coaches work with many of the world’s best triathletes, cyclists, and runners every day from home base in Boulder, CO. ECFIT workouts allow these athletes to train harder, longer, and without injury, then show up at the starting line ready to compete at the highest level.

Featured Triathlon Training Program:

PHASE 1: IM STRENGTH – Based on Timothy O’Donnell’s ECFIT Strength Program leading into his 2nd place finish in Kona 2019!

Buy Now View Programs

Get our Strength Training Program App

Get the ECFIT Strength Training Program App and train like the pros, but from home. The app includes videos of each 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 Boulder mobile application, available for iOS and on Google Play.


Purchase your program using the email address that you use to log into the app. It may take up to 24 hours for your 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 & move better in training. You’ll be able to train harder, recover faster, and perform at a higher level.

Athlete Testimonials

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

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

Flora Duffy
4x XTerra World Champion

Receive 1 Week Free Training

Sign up for ECFit news and updates and receive 1 week free training via the ECFit App

Thanks for signing up! You will receive a follow up email within 48 hours for instructions on getting started with your free training!