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Greenville, SC

Trimarni is place where athletes and fitness enthusiasts receive motivation, inspiration, education, counseling and coaching in the areas of nutrition, fitness, health, sport nutrition, training and life.

We emphasize a real food diet and our coaching philosophy is simple: Train hard, recover harder. No junk miles but instead, respect for your amazing body. Every time you move your body you do so with a purpose. Our services are designed with your goals in mind so that you can live an active and healthy, balanced lifestyle.


 After spending much of my adult life learning about the physiology of the body during exercise, as well as working as a clinical dietitian and coach, I have had great success in helping individuals of all ages and fitness abilities learn how to develop a healthy relationship with food. More so, with new "food" freedom and trust in the daily diet, I have helped athletes (and fitness enthusiasts) learn to eat in a way that maximizes performance as well as reduces risk for injury/illness. With a basic understanding of your individual needs, you will quickly find yourself recovering faster after workouts, encouraging gains in lean muscle mass and eliminating "sports nutrition" fears when it comes to eating before, during and after workouts and racing.


Retül Bike Fit


Retül Bike Fit


A proper bike fit is essential for optimal performance, efficiency, injury prevention and comfort on the bike, and will provide a rider with the most economic means of expending energy. 

The Trimarni RETUL fit studio is located in Greenville, S.C., near Traveler's Rest. If you are interested in a RETUL fit (or refit), contact Karel to schedule an appointment. Please allow at least 2 hours for your RETUL bike fit. 


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Why every cyclist and triathlete needs a bike fit

Now that you have a bike, it's important that your body is fit properly to your machine.

A bike fit from a professional fitter is essential for athletes of all fitness levels for optimal performance, efficient pedal strokes, injury prevention, and overall comfort on the bike. In other words, a bike fit provides you with the most economic means of expending energy as you cover the distance on two wheels.

Riding a bike should be fun but many riders try to adapt their bodies to a bike that is not positioned appropriately for the body, which not only limits cycling performance gains and strong running off the bike, but also increases the risk for pain in the knees, hips, neck, shoulders, psoas, ITB tightness, and lower back.

Trimarni Coaching and Nutrition believes that every athlete should have a professional bike fit before starting a training plan or for those wanting to take training to the next level.

Trimarni Coaching and Nutrition is now an official Retül fitter. Retül offers bike fit tools, technology and education to guide qualified bike fitters in making objective and comprehensive bike fit decisions.

Retül 3D Motion Capture Bike Fit on Existing Bike: $275


  • Biomechanical analysis
  • Cycling-specific flexibility/functional strength assessment
  • Dynamic data capture of 3D full body movements to determine optimal position
  • Real-time recording of power output and physiologic response to help determine optimal position
  • Comprehensive digital reports of 3D and 2D body parameters, 3D bicycle fit coordinates, and bike frame geometry 
  • An additional bicycle is priced at $199 when you choose to receive another Retul fit for yourself (for example, your road and mountain bike, fit back-to-back).

Follow-up Appointment: $150/hour

A follow-up appointment is available for clients who have already been through a Retul analysis, and are in need of adjustment.

A follow-up appointment is appropriate for a bike that has been fit by Retul within one year prior to the follow-up appointment date.

A follow-up appointment is appropriate for part changes and recommendations.

Note that each fit with Retul is guaranteed. If you are experiencing problems with your fit, appointments made within two weeks of original fit appointment will be free of charge. (has to be performed at our location, not valid for "travel to/in house appointments).

If you are a member of a team or training group and would like to receive a discount for multiple fits and for us to travel to your town, please contact for more details.

RETUL fits are performed at Open Road Bicycles (Beach Location) by Karel Sumbal. After purchasing, you will be contacted via email to schedule a time/day for your RETUL fit.