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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.



Marni and Karel are a husband and wife team, dedicated to helping newbie, experienced, elite and professional athletes maximize sport performance.
Marni is a board certified dietitian with a Master of Science in exercise physiology. She specializes in triathlon coaching, race planning and execution, individualized sport nutrition, training and racing fueling and hydrating planning, nutritious eating, plant strong diets, body composition changes and helping athletes improve their relationship with food and body image.
She is also a qualified speaker and experienced writer.

Karel is a skilled bike mechanic with a precise eye for detail. He has decades of experience in the bike industry. Karel is an experienced RETUL bike fitter and provides a wealth of knowledge to age group and professional athletes in the areas of triathlon training and racing, cycling skills, equipment/gear choices and appropriate bike fits.

As elite athletes, Marni and Karel bring years of practice, education and skills in their own athletic careers and can apply that experience and knowledge to athletes of all levels.


Trimarni philosophy:
Our goal is to help athletes reach performance goals without compromising health.
We incorporate scientific research with practical ideologies to help you take your training and racing to the next level.
Let us help you perform at your best by giving you the individual and personalized services that you and your body deserve. 


LET us help you train smarter to train harder with a
 20-week Olympic, Half and Ironman training plans. 


Click here to learn more about our camps. They offer the right mix of training, skill focus, education and fun.  Check out our 2016 Race schedule for our tentative camp dates this summer. 


A private training camp is the perfect option for the athlete who needs specific attention and wants to become a smarter, fitter and stronger athlete. 

If you, or a small group of friends, are looking for an incredible training experience in Greenville, SC., let us help you plan the perfect train-cation near the mountains. We will address your needs to create the perfect training experience.

Private training is an efficient, valuable and informative solution for the athlete who has specific limiters which are preventing consistency in training or keeping you from getting to the next level with your fitness. 

We can build your confidence while cycling - descending, climbing, cornering, riding in the wind. 
We can build your skills while swimming -
strengthen your skills for open water
We can build your running resilience - climbing and descending hills, learning how to run more economical off the bike

We will also address the following at your private training camp:
-Sport nutrition
-Daily nutrition
-RETUL fit
-Skill work
-Intentional training overload (2.5-4 day camp)

Are you ready for an incredible training experience in Greenville? 

Contact us for our next availability and pricing.


Trimarni coaching and nutrition offers a wide range of nutrition, coaching and cycling services. Our services are designed to help you live a more healthy and active lifestyle as you work to reach your goals. If you don’t see a service that interests you, contact us to create your own personalized service. 


"... Marni has motivated me to dream big. She lives by that example and has given me tools not only to race and eat effectively, but to have a few PR's in the process. I couldn't have done it without her thoughtfulness, knowledge, and positive energy."
-- Sara Lane

" Marni is always eager to help and her positive energy is contagious. Marni is truly a blessing in my life and I am so grateful to have her as my coach."
-- Cindy Stellmach

More Testimonials

DO yOU WANT TO BE A TRIMARNI COACHING ATHLETE? GREAT! BEcause we want YOu to be part of our team!

With the purchase of any 20-week Trimarni triathlon training plan, you can become a Trimarni athlete as a Performance Team member. For only $50/month, you will receive our weekly “check-in” emails which cover topics like sport nutrition, daily nutrition, race strategy, motivation, mental skills, mobility, strength training and so much more! You will also be able to join our private Trimarni Coaching Facebook page to socialize with your fellow Trimarni teammates and ask questions to your coaches. You can also connect with us at key Trimarni races and get priority registration for our camps, and receive all Trimarni sponsor discounts. You can cancel your $50/monthly payment anytime.

When purchasing your 20-week training plan, select "Performance Team". After your training plan is emailed to you, you will officially become a Trimarni athlete! We are looking forward to the opportunity to coach you.

As recent 2015 Ironman World Championship finishers and experienced endurance athletes, we understand what it takes in training in order to excel on race day. We want to help you feel prepared, physically, mentally and nutritionally for your upcoming races this season. No matter what level athlete you are, we want to be part of your training and racing journey! -Your future coaches, Marni and Karel .

Order your Trimarni hat or visor.

(please place your order by may 9th) 

Solestar - The new level of cycling insoles. Trimarni is now a Solestar dealer

Solestar - The new level of cycling insoles. Trimarni is now a Solestar dealer

If you have a PERFORMANCE or nutrition goal
LET Trimarni COACHING AND NUTRITION help you reach it.