Our Story
Trimarni Coaching and Nutrition is a coaching and nutrition company based in Greenville, SC. owned by Board Certified Sport Dietitian Marni Sumbal MS, RD, CSSD, LD/N and RETUL bike fit extraordinaire, Karel Sumbal.
Marni holds a Master of Science in Exercise Physiology and is 17x Ironman triathlon finisher and 5x Ironman World Championship finisher (6x qualifier) She holds a 10:06 Ironman PR and she was the overall female amateur at 2017 Ironman Chattanooga.
Karel is a category 1 cyclist turned 14x Ironman finisher. He has completed 4x Ironman World Championship events (5x qualifier) and has an Ironman PR of 9:13. He is consistently running one of the fastest amateur male splits Ironman distance events. He has over 20 years’ experience as a bike mechanic and five years of experience as the GM of the Trek Bicycle Store of Jacksonville, FL. Lately, you can find Karel off-road, either mountain biking or gravel biking as he trains for Xterra events.
Marni and Karel have a combined 31 Ironman finishes, 9 Ironman World Championship finishes and countless years of formal and personal experience, education, instruction and knowledge as it relates to endurance training, nutrition, cycling, swimming, endurance racing, ultra distance training, sport nutrition and coaching.
This duo is dedicated to helping athletes achieve athletic excellence while maintaining great physical and mental health.
Marni and Karel also have a great love of the outdoors, nature and animals. They love to travel and they crave adventure. At home, they share their house with their furry family of rescues: Campy (14-year old Chihuahua greyhound mix), Madison (14-year old cat), Ella (3-year old cat), Sylvi (2-year old cat) and Asher (7-month old cat).