Source Endurance Services



No two athletes are alike. At Source Endurance we offer a range of individual and group coaching services, along with specific nutritional services based on your needs. As part of the Source Endurance family, the focus is on you. We strive to help each client set realistic goals. Then, using a training approach based on your lifestyle, cutting edge science, and an unprecedented attention to detail, we begin the process of achieving those goals.

Individualized Training

Individual Coaching

Choose the tier of coaching that best fits your lifestyle and goals. No matter your level, every tier’s foundation is a customized training plan to you, based on your goals, work-life balance, and the latest science.

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Nutrition Services

Coach Kristen Arnold MS, RDN, CSSD offers a range of complementary nutrition services from weight loss to everyday fueling to race day hydration, a wide range of nutrition services abound to optimize your performance. 

"My season goal was to finish DK200. Goal crushed. I can’t say enough how well the plan leading up to Dirty Kanza worked out. Perfect on so many levels, I was beyond ready mentally and physically, evidence by beating my DK goal by almost 2hrs. BWR challenged me technically, but the rest was a piece of cake in terms of my readiness for the duration and heat."

- Sonja Johnson

zwift coaching

Zwift Coaching

Whether you are a year-round Zwift or indoor rider or a use it as a winter training tool, Source Endurance can help you maximize your fitness and w/kg to perform your best.

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Training Plans

Training plans by Source Endurance are next to none. These plans are tailored to optimize the productivity of athletes.


Group Coaching

Our most economical package. Designed to unify its riders through structured training, coach consultation, and direction towards a common goal, Source Endurance offers several levels to best fit the needs of the group or team.

Private Ride

Private Ride & Skills Sessions

Training to win can be more than just logging the miles or going through the motions. Master a challenging workout with your coach, dial in specific skills, or tackle team tactics with a private session with a Source Endurance coach.



Source Endurance offers CEU credits for USA Cycling Coaches.  Our content ranges in difficulty from the basic scientific processes to in-depth physiological adaptations. Includes an educational webinar and a follow up quiz for CEU credits.

Testing Services

Testing Services

Source Endurance is the premier provider of training design and management, physiological testing, nutritional analysis and psychological preparation for endurance athletes. We partner with several universities for LT & VO2 testing.

Team Ride and Skills Session

Team Ride Session

Dial in your team tactics, learn team time trial technique, practice your lead out with an experienced coach. Team ride session utilize an outside coach to get your team operating cohesively to gain an edge on the competition.


Coaching Consulting Session

Source Endurance Coaching Consults are a one-off session to evaluate your training, discuss strengths and weaknesses and recommendations moving forward, ideal for a non-Source Endurance athlete or as a supplementation for current athletes.

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Team Nutrition Talks

Team Nutrition Talks provide nutritional recommendations and more for a team of any type, athletic or workplace.