We realize that no two athletes are alike. We all have different health and fitness goals, we live different lifestyles and we all come from different athletic backgrounds.

We treat every one of our coaching athletes as individuals, recognizing your unique strengths, weaknesses and limitations. It is our goal to help you get the most out of your training so that triathlon enriches your life. We never want you to feel as if training takes over your life but instead, it is part of your lifestyle.

Between us both, we have successfully finished 29 Ironman triathlons and have qualified for the Ironman World Championship ten times. We understand the physical demands of endurance racing and the training needed to properly prepare for an endurance event. No matter what level athlete you are, we want to be part of your training and racing journey.

Marni is a Board Certified Sport Dietitian (CSSD), 20x Ironman finisher, 3x XTRI finisher, 6x Ironman World Championship finisher, 5th place AG at 2021 IM St. George World Championship, overall female at ‘24 IM 70.3 Louisville and overall female amateur at ‘24 IM Chattanooga. She holds a Master of Science in exercise physiology. She is the author of Essential Sports Nutrition, The 365-Day Running Journal and Athlete to Triathlete. She specializes in sport nutrition and she is a certified USA Triathlon coach. With a great understanding of the physiological and nutritional requirements of training for endurance sports, she enjoys working with triathletes and runners of all levels. She has coached fitness enthusiasts to become Ironman finishers and has helped many age-groupers reach personal best times and achieve life-long fitness goals. She has also helped many athletes improve dietary habits to reach health goals and with an extensive background in sport nutrition, she has helped countless athletes feel confident for race day with a solid race day fueling plan, supported by great mental and physical health.

Karel is an experienced RETUL bike fitter with exceptional skills as a bike mechanic. As a cat 1 cyclist turned triathlete, Karel has the ability to think like a cyclist and triathlete in order to help Trimarni athletes learn how to bike smarter as it relates to gearing, cadence, power, bike fits and pacing. Karel is a 16x Ironman finisher, 2x XTRI finisher and has competed in the IM Kona four times since becoming a triathlete in 2012. 

Marni and Karel share the primary coaching responsibilities with the Trimarni team. Assistant coach Joe oversees the advanced coaching category when it comes to reviewing workouts, modifications and overall support and motivation. He also has a great eye for data. We are lucky to have him part of our coaching team.

We enjoy the developmental process of working with athletes. We provide great detail and attention to every workout which includes focus on strength training, daily and sport nutrition, pacing, intervals, mental toughness and recovery. Above all, we want our athletes to feel confident and prepared when it comes to racing.

Thank you for considering Trimarni Coaching to help you reach your short and long term triathlon goals. 

After reviewing the individual coaching categories, we encourage you to read the commonly asked questions on the bottom of this page to ensure that Trimarni is the right fit for your needs. 

"Don't lower your expectations to meet your performance. Raise your level of performance to meet your expectations. Expect the best of yourself, and then do what is necessary to make it a reality." 

- Ralph Marston

ARE YOU INTERESTED IN BECOMING A TRIMARNI ATHLETE? CHECK OUT YOUR OPTIONS.

If you are interested in coaching for the 2025 season, send us an email. Limited availability.

Our monthly coaching charge is $300/month. Coaching is much more than writing workouts. We are always available for you. We provide communication, bike tech assistance, sport nutrition, daily nutrition, education, team support, race strategy and a lot more to ensure you get the most out of your coaching experience. We understand that coaching is an investment. If our monthly coaching amount doesn’t work in your life budget, we ask that you still apply and let us know your circumstances regarding your coaching budget in the coaching application.

Our Trimarni Coaching application period for the upcoming year is only open once a year
To be part of the Trimarni team as a one-on-one athlete we open our application in September/October. Do not miss out on this one-time opportunity to complete your coaching application. We give priority to returning coached athletes and team members.

If you are not interested in one-on-one coaching but would like to be part of the Trimarni team, consider a Trimarni training plan and joining our team.

TRIMARNI TEAM MEMBERSHIP

We would love for you to join our Trimarni family!

We are all from different background and from different parts of the world. The Trimarni community is the place where we all connect so that we share this incredible triathlon journey together. Trimarni is a place where everybody is somebody.

As a Trimarni team member, you can ask questions anytime (on any topic!), watch (or re-watch) weekly LIVE educational videos, get your race results highlighted and feel inspired with our weekly team newsletter and become a member of our private Trimarni Coaching Facebook page - a helpful, supportive resource for motivation and education. You also receive discount codes to all Trimarni affiliates.

As a Trimarni team member, you will receive an extensive amount of information on the areas that we feel will help optimize your fitness, performance and health. Within our team Google Drive Folder, you will be able to access countless educational handouts, videos and documents on the following topics (not limited to):

• Sport nutrition (ex. race week/day nutrition, recovery nutrition, fueling/hydration).

• Daily nutrition (ex. off-season, peak training, etc.)

• Race course tips and strategies.

• Guest speakers (experts and professionals in the field of endurance sports).

• Mental skills.

• Open Water Swimming tips.

• Racing (ex. travel tips, post-race, taper).

• Gear and equipment.

• Swim/bike/run skills and mobility/strength.

• ….. and so much more!

Lastly, as a Trimarni team member, you can look forward to connecting with your teammates at events, camps and races. All Trimarni team members receive priority registration and discounts to our group camps, immediate access to our team kit, a discount to select Trimarni services such as nutrition consults, training plans and bike fitting and the opportunity to attend our pre-race pizza party and course talk before team races (2025 races are 70.3 Gulf Coast, 70.3 CDA, IM Lake Placid).

Trimarni ATHLETE Alumni Program

The coach-athlete relationship is a special one and at Trimarni, we believe you are more than just an athlete and we are more than just “workout writers”. As a Trimarni athlete, we share your life with you. You willingly let us into your life and we get to know you and your family/friends/kids. We share lots of ups and downs together and you confide in and trust us, as your coaches.

We realize that over a period of time, life changes and you may no longer need us as your coach. However, once a Trimarni, you are always part of our family. While you may no longer be a one-on-one athlete, we want to make sure that you have the opportunity to keep your Trimarni athlete identity. 

An important focus for the continued growth of Trimarni is maintaining a connection with our past athletes. With the Trimarni coaching alumni program, we allow our recent coaching athletes to remain connected to their teammates and build new Trimarni friendships.

As a recent Trimarni athlete, we would like to offer you the opportunity to stay part of the Trimarni team.
For $80/year, you will receive the following:
-Access to the Trimarni team private Facebook page.
-Access to weekly Trimarni team Facebook live chats.
-Weekly educational emails.
-Trimarni affiliate discounts.
-Race results included in weekly newsletters.
-Select discounts to Trimarni services such as nutrition, bike fits and training plans.
-Priority registration to Trimarni training camps.
-Join our pre-race pizza party + course talk at team races.
-Team support.

Requirements:
-You have been coached one-on-one by Trimarni for 1+ years or you have been part of the Trimarni team (edu member) for 2+ years.

We look forward to keeping you part of the Trimarni family.

Commonly asked QUESTIONS FOR INDIVIDUAL COACHING

1) How do I know if I should apply for one on one coaching?
 
We design your training to fit into your life, to ensure that your training fits into your work, life and family schedule. Your training is designed with your key races as priority so that you develop and peak appropriately. We are dedicated to your overall development and we want to monitor your progression as much as possible. We want to help you optimize your athletic performance and we will give you our full attention and support, whenever you need us, along the way. We will be available to you throughout your season, via email, text, phone, Facetime/Skype, anytime you need us.We value a long-term relationship as we are invested in your short and long term goals.
Our coaching is designed for….
-The athlete who wants a close coach/athlete relationship - we will play an integral in your life, we are invested in you as our athlete.
-The athlete who desires constant feedback, accountability, support, education and monitoring.
-The athlete who is extremely dedicated and motivated and is willing to make the necessary investments to excel in triathlon.
-The athlete who constantly struggles with consistency and requires a very individualize training plan, that often needs adjustment. 
-The athlete who experienced overtraining or an unhealthy coach-athlete relationship in previous years.
-The athlete who prioritizes health and performance.

2) I’m interested in adding trail runs, Xterra races, extreme triathlons and gravel events to my race calendar. Can you coach me?

YES!! We now have an adventure team. Although running and cycling are part of a triathlon, off road racing requires different training demands, skills, strength, nutritional needs and physical requirements. With a combined 31 successful Ironman finishes between Marni and Karel, including 9 Ironman World Championship finishes and countless half ironman distance triathlon finishes, including several male and female overall amateur wins, Marni and Karel understand the demands of endurance sports and can help you transfer your triathlon training to different multisport events and adventures.

It’s important that athletes understand that as a triathlete, you are a multisport athlete. As an example, it would be a mistake to stop swimming just because you are training for a trail race. We are experienced in coaching endurance athletes and we can help you safely transfer your triathlon fitness to different events like trail running, off-road triathlon, stage cycling races and gravel events. We keep up with current research, trends and training methodologies, all of which ensures that our athletes receive the best style of training possible to prepare for your upcoming events. We are 100% invested into making sure you have a safe, fun and successful athletic journey - on and off road.

3) I want to run a marathon to see if I will be ready to do an Ironman… will you still coach me?

It takes tremendous amount strength and resiliency to train for a marathon and this may take away from consistent triathlon training. This isn’t to say that you can’t participate in running events, but we don’t believe in dividing your year into a run season and then a triathlon season. Additionally, we don't believe that to be a better triathlete, you need to become a better runner through marathon training. We have found great success in helping triathletes become faster runners off the bike through specific workouts, designed to improve resilience, strength and endurance. 

4) I’m not fast, will you still coach me?

Absolutely! We believe in developing athletes of all fitness levels. We want to coach motivated athletes who have a passion for personal growth. We have experience working with all level triathletes We help our athletes improve swim/bike/run skills, nutrition habits, lifestyle routines, racing tactics, and sport nutrition/fueling strategies – all of which can help you become a faster, stronger and better all-around triathlete. Plus, fast is all relative. If you want to experience success as an endurance triathlete, you don’t need to be fast. You need to be healthy and mentally strong.

5) I am not sure if I need a coach. 

We are honored that you are considering Trimarni coaching to help you reach your athletic goals. Over the years, we have worked with many athletes who have progressed to new exciting levels in fitness, all through hard work, consistency and trust in their coaches. We have had athletes podium at races, achieve PRs, cross the finish line at a half or full distance triathlon for the first time and qualify for the Ironman World Championship. While we appreciate that you are putting your trust into us as your coaches, we believe that you are already on your way to achieving your big scary race goals, simply because you are willing to make the necessary investments in your daily and triathlon lifestyle. You may want to consider joining our team before signing up for one on one coaching.

6) Can you explain more about the team membership? 

The team membership is our way of helping you learn about the sport of triathlon as well as other multisport events. While there is no shortage of information available to triathletes, in magazines and books, on the internet, on forums and blogs, it can be difficult to decipher the “best” information for you and your needs and how to apply what you read. As a member of our team, not only do you have the opportunity to ask questions to Marni, Karel and Joe, but you have an unlimited amount of education coming your way, on topics that you will find practical and season-appropriate, throughout the year. This service goes well with our training plans so that you can learn from us as you follow your personalized training.

A highlight of our team is the weekly “check-in” handout that you will receive in your inbox once a week. This weekly newsletter includes athlete race results, team discounts from affiliates and partners, an educational article, a question of the week and info on past and future live chats. We also share videos, questions and conversations that will help you with your triathlon knowledge. Every week, you will read about a specific training, racing or nutrition topic that will be relevant to your season but also to the sport of triathlon. Perhaps it was a question you asked about how to ride your bike in the wind or how to fuel/hydrate for a long run in the heat or maybe you never knew how to properly run up hills or how to taper for a long distance triathlon?  The topic choices are endless and that is why athletes love being part of our team - they are simply excited to learn and apply, learn and apply.
As a team member, you also receive discounts from our partners, access to our private team Facebook page and can ask questions anytime. We understand that training can often be lonesome and sometimes your family and non-tri friends don’t always “get you.” Our private team page is an outlet where you will never be judged, there are no silly questions and the support, motivation and inspiration is never-ending.  If you ever need to laugh or smile, there’s a good chance that you can come to our Trimarni private team Facebook page and your day will suddenly get better. We see our private team page as a way for our athletes to connect and to make friendships with teammates. 

7) Do I have to be a Trimarni coaching athlete to participate in a group or private training camp?

Anyone can attend a Trimarni group or private training camp but Trimarni athletes and team members receive a special discounted price.

Our private camps are the perfect option if you need personal attention. In Greenville, SC. where we hold our private camps, we can give you the perfect train-cation near the mountains as we address your specific needs to create the perfect training experience. Our roads are bike-friendly and our mountain views are incredible.
Private training is an efficient, valuable and informative solution if you have particular limiters which are preventing consistency in training or keeping you from getting to the next level with your fitness. All skill levels are welcomed. Our camps tend to be cycling specific (if desired) as we have the perfect terrain to help you improve your bike handling skills, combined with an experienced cyclist turned triathlete to give you one-on-one attention.
Our group camps offer the perfect mix of training, skill focus, education and fun and we can promise that you will leave camp with improved fitness and confidence and long-lasting memories, with new friends.  Retul fits are provided at our group and private Greenville camps for an additional charge (at a discounted rate).