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About Marni


Registered Dietitian specializing in sport nutrition, Master of Science in Exercise Physiology, 9x Ironman finisher, 3x Ironman World Championship qualifier and finisher, 2015 Kona bound, USAT level 1 coach, business owner, lacto-ovo vegetarian, doggy mommy, wife to a cyclist turned Ironman triathlete, speaker, writer.
Big dreamer. No excuses.


Marni's Background


Born and raised in Lexington, Kentucky. I started swimming when I was around 11 years old. My brother was a gymnast from an early age and studied business at the University of Michigan while competing as a Division I gymnast. In his senior year he became the 2007 Big Ten High Bar Champion. Somewhere around 10 years of age, I decided I didn't want to kill animals so I became a lacto-ovo vegetarian. After receiving a BA in Exercise Science and a minor in psychology from Transylvania University in 2004 and finishing four years of competitive collegiate swimming, I moved to Davie, Florida for graduate school. A few semesters later, while dreaming of a career as a collegiate/professional Strength and Conditioning coach, I received a Master of Science degree in Exercise Physiology. I now hold a Florida license as a registered dietitian and worked PRN as a Clinical dietitian at Baptist Medical Center Beaches. When I was in graduate school, my life consisted of studying, working in the lab, teaching undergraduate classes, going to class and more studying. I really missed competitive sports  so I decided to train for a marathon since it seemed like the popular thing to do in Florida. Prior to my marathon training for the 2005 Miami Marathon, I participated in a few triathlons with the help of my cool Giant Hybrid bicycle. I coached myself for all my triathlons and running races while in graduate school. After running a 3:38 for my first marathon, I was shocked to find out that I had qualified for the Boston Marathon.  Excited that my body and mind enjoyed endurance events, I decided it was time to step things up and buy a tri bike after I participated in the 2006 Boston marathon. And while I was at it - I signed up for 2006 Disney Half Ironman in May and Ironman Florida in November. 

In 2006 I participated in the Boston Marathon, Disney Half Ironman and completed my first Ironman - Ironman Florida. Around the end of May of 2006 when I turned 24 yrs, I met my now husband Karel who thought I was a bit crazy for enjoying endurance events. 

Amazingly, as crazy as everyone thought I was for dreaming big at my first Ironman, I qualified for "Kona" at IMFL. This time, I knew what I had qualified for as that was my dream going into the race.

I've had my ups and downs with training and injuries and life challenges so I won't include that in this short bio. However, the best thing I can take away from my past is learning from mistakes to prepare for a better future.  With my personal experience and education,  I enjoy coaching and helping others to reach their own personal goals and to reach finishing lines. Karel no longer thinks I am crazy but instead, he enjoys this great lifestyle with me. Perhaps our lifestyle may seem a bit crazy but it is our way of making memories and traveling the world and I wouldn't want it any other way.

After graduating with my Masters and spending a little time working as the wellness coordinator of the Trinity YMCA, I desired a better understanding of nutrition from a different point of view (aside from sports) so I decided to go back to school for another three years in order to obtain my Registered Dietitian credential. I now hold a Florida license as a registered dietitian.

When I am not training or working, I love making plant strong creations and taking pictures of delicious food. I love my dog Campy (who is named after Campagnolo - Italian high-end bike component) and he is very famous for the best smiling and sleeping pictures.  

In January 2012, my dream came true of owning my own business and Trimarni Coaching and Nutrition, LLC was born. I have had the opportunity to help athletes and fitness enthusiasts from all over the world, reach personal fitness and nutrition related goals and I am inspired by every individual whom I work with and help.

As a big dreamer, I look forward to seeing my business grow, writing books (perhaps a cookbook), traveling the world, speaking on a national level and using my body to cross finish lines.



Marywood University - Distance Dietetic Internship
June 2010-May 2011, Scranton, PA. Completed May 2011.

University of Northern Colorado, Distance Dietetic Program Dietetic verification statement
May 2008-August 2009, Greeley, Colorado.

Florida Atlantic University, Master of Science in Exercise Physiology
Graduate December 2005, Davie, Florida.

Transylvania University, Bachelor of Arts in exercise science and a minor in psychology
Gradauted May 2004, Lexinton, KY.


Florida Licensed Dietitian and nutritionist - ND 6082

Commission on Dietetic Registration, RD certified, June 21, 2011


USA triathlon level 1 coach – certified 2007-current


American Heart Association CPR certified, 2008-Jan 2010

Red Cross certified – 1996-2008, 2010

International Society of Sports Nutrition Certified Sports Nutritionist (CISSN), 2005-current

Received a certification by the American Dietetic Association in Adult Weight Management, 2009


American Dietetic Association, 2008-present

International Society of Sports Nutrition, 2004-present

Vegetarian Nutrition, 2009-present

Sport, Cardiovascular and Wellness Nutrition, 2009-present



PR's and Achievements



* Boston marathon qualifier

 ** Ironman World Championship qualifier

 *** Ironman 70.3 World Championship qualifier


Personal Records

SpaMe 5K, St. Johns, FL: 19:52 (2012)

Rotary 10K, Trinity, FL: 40.09 (2011) - Overall female winner

Gate River Run, Jacksonville, FL: 105:2 (2010)

Half Marathon:
Subaru Half Marathon, Jacksonville, FL: 1:31:51 (2011)

Half Marathon:
Iron Girl Clearwater, Clearwater, FL: 1:33.25 (2012), Overall female winner 

Miami Marathon, Miami, FL: 3:38.28 (2005)*

Olympic distance triathlon:
Jacksonville Tri Series #3, Fernandina Beach, FL: 2:15.21 (2012)

Half Ironman:
Rock n' Rollman, Macon, GA: 5:04.56 (2010)

Half Ironman:
Branson 70.3, Branson, Missouri: 5:19.02 (2012)***, Overall amateur female winner, age group course record

Half Ironman:
HITS Ocala, Ocala, FL 5:06.29 (2014), Overall  female winner

Rock n' Rollman, Macon, GA: 3:18 (2013), Overall winner

Ironman Distance Triathlons

Ironman Florida
Panama City Beach, FL: 11:00.47 (2006) 1st age group**

Ironman World Championship
Kona, Hawaii: 12:26.58 (2007)

Ironman Kentucky
Lousiville, Kentucky: 10:53.45 (2009), 7th age group 

Ironman Wisconsin
Madison, Wisconsin: 10:57.53 (2010), 4th age group **

Ironman World Championship
Kona, Hawaii: 11:02.14 (2011)

Ironman Lake Placid
Lake Placid, New York: 10:43:14 (2013), 5th age group**

Ironman World Championship
Kona, Hawaii: 10:37:10 (2013)

Ironman Austria
Klagenfurt, Austria 10:17.35 (2014), 7th age group 

Madison, Wiscosin 10:44:.47 (2014), 3rd age group**

Ironman World Championship – October 2015



Trimarni Coaching and Nutrition, LLC -- Owner

Triathlon coach, sport nutrition consultant, writer, speaker. Jacksonville Fl.

Coach all levels of athletes to reach personal performance and weight goals

Contribute articles to various sport/health-related websites and magazines, such as  Fitness,  Shape, Health, Women's Health,  Men's Journal, Runners World, Cosmo Girl magazine, Bicycling,  Women’s Running,  Women's Health, LAVA, Triathlete magazine,, USA, LAVA online,,

Monthly columns:, USAT multi sport zone and Topics include health, wellness, fitness, exercise physiology and sport nutrition.

Past Employment

Baptist Medical Center Beaches - Clinical Dietitian (PRN) (2011-2014)

Assess, diagnose, intervene, monitor and evaluate patients in all units of hospital.

Provide outpatient counseling, as neded

Provide patient education

Involved in Baptist Heartwise program (screening/education program for women)