Fuel Smarter. Train Stronger. Perform Better. STay Healthy.
As a Board Certified Specialist in Sports Dietetics (CSSD), Registered Dietitian, accomplished endurance triathlete, and holder of a Master of Science in Exercise Physiology, Marni brings a unique combination of education, clinical expertise, and real-world athletic experience to every athlete that she works with.
Marni's approach goes beyond performance metrics. She focuses on the whole person—not just the athlete—develop sustainable nutrition and fueling strategies that support athletic success, long-term health, and a positive relationship with food and body.
Whether you're preparing for your first endurance event, chasing a personal best, wanting to overcome persistent GI issues, or seeking to optimize your fueling strategy for a podium performance, Marni provides individualized guidance grounded in science, practicality, and experience.
In a world filled with nutrition myths, social media trends, and conflicting advice, Marni helps athletes cut through the noise and focus on evidence-based strategies that actually work.
Proper nutrition is one of the most powerful performance tools available to an athlete. When your body is adequately fueled, hydrated, and nourished, you can train harder, recover better, perform more consistently, and improve your long-term health.
Areas of Expertise
Daily nutrition and nutrient timing
Sports nutrition application and understanding sport nutrition science
Carb loading and race day fueling and hydration
Plant-based nutrition (vegan, vegetarian)
Hydration, electrolytes, and cramping management
Recovery nutrition
Endurance and ultra-endurance triathlon fueling
Gravel cycling, mountain biking, trail running, ultra running, extreme triathlon, and Xterra fueling
STEP 1: Determine the best service for your needs
Performance
Nutrition
Foundation
Nutrition
Build the nutritional habits that support consistent training, recovery, health, and long-term athletic success.
This nutrition package is designed for athletes who want personalized guidance, accountability, and support to improve their daily nutrition habits. Whether you're training for an event or simply looking to better nourish and fuel your active lifestyle, this program focuses on creating a sustainable approach to eating that supports both performance and overall well-being.
You'll learn how to nourish your body to meet the demands of training while improving recovery, energy levels, and day-to-day health.
This package focuses on daily nutrition and eating habits rather than race fueling or sport-specific nutrition strategies. If you're looking for detailed guidance on training nutrition, race fueling, hydration, or nutrient timing, the Performance Nutrition Package may be a better fit.
Is This Package Right for You?
This service is ideal for athletes seeking guidance in:
Daily nutrition and meal planning tips
Meeting energy needs to support training
Understanding personalized macronutrient needs (carbohydrates, protein, and fat)
Blood sugar management, appetite, and food cravings
Nutrition strategies to support sleep, energy levels and recovery
Building and maintaining a healthy and sustainable relationship with food and the body
Long-term health optimization
What Is Included?
This coaching package provides personalized support over a 4-week period and includes:
One 60-minute initial consultation via Zoom, Google Meet, FaceTime, phone - athlete preference
Three 45-minute follow-up consultations scheduled as needed over the next 3 weeks.
Individualized recommendations and action steps emailed following each session.
Unlimited email support between consultations for questions, feedback, and accountability.
Review of recent laboratory work (if applicable and completed within the previous six months).
Eliminate the guesswork from your nutrition and fueling strategy. Develop a personalized plan that supports your training, protects your health, minimizing GI issues and helps you arrive at race day fully prepared to perform your best.
Do you struggle with race fueling, hydration, recovery, gastrointestinal issues, or knowing exactly what and how much to eat around workouts?
This comprehensive nutrition package is designed specifically for athletes who are preparing for an athletic event. This program combines daily nutrition guidance with individualized sport nutrition, hydration, and nutrient timing strategies to help you meet the demands of training as you prepare for your upcoming event.
Together, we'll develop a personalized daily nutrition and sport nutrition approach that supports your health, maximizes recovery, improves training adaptations, and helps you arrive at race day feeling confident and prepared.
Is This Package Right for You?
This service is ideal for athletes seeking guidance in:
Meeting daily energy and nutrition requirements
Meal and snack planning to support training demands
Understanding changing carbohydrate, protein, and fat needs.
Adjusting nutrition based on training volume and intensity
Workout-specific fueling and hydration strategies
Understanding sport nutrition science
Recovery nutrition
Preventing or minimizing gastrointestinal distress
Sports nutrition product selection and application
Fueling long workouts and multiple-session training days
Developing sustainable nutrition habits that support long-term performance
What Is Included?
This coaching package provides personalized support over a 4-week period and includes:
One 60-minute initial consultation via Zoom, Google Meet, FaceTime, phone - athlete preference
Three 45-minute follow-up consultations scheduled as needed over the next 3 weeks.
Individualized recommendations and action steps emailed following each session.
Unlimited email support between consultations for questions, feedback, and accountability.
Review of recent laboratory work (if applicable and completed within the previous six months).
POst Race Debrief
Turn a disappointing race into a valuable learning opportunity.
Sometimes race day doesn't go as planned.
One of the most common reasons athletes underperform on race day is poor nutrition, hydration, or fueling execution. Issues such as bonking, cramping, nausea, vomiting, gastrointestinal distress, dehydration, dizziness, or severe fatigue can quickly derail an otherwise successful race. In more serious cases, athletes may find themselves unable to start the event, forced to quit, requiring medical attention, or spending time in a medical tent or hospital after the race.
If this happened to you, you're not alone. But most importantly, let’s figure out why it happened. The goal of this service is to identify what went wrong, understand why it happened, and develop a plan to help prevent it from happening again.
Is This Service Right for You?
This service is designed for athletes who experienced any of the following during or around race day:
Nausea, vomiting, dizziness, reflux, or lightheadedness
Diarrhea, stomach cramping, bloating, or gastrointestinal distress
Dehydration, cramping, or significant fatigue
Swelling of the hands, feet, or face
Difficulty executing a planned fueling strategy
Fainting, collapse, or loss of consciousness
Medical tent treatment, IV fluids, or hospitalization
Performance that fell significantly short of expectations
Nutrition issues that only occur on race day but not during training
Unable to perform to your potential, despite being physically prepared
Even if your race went reasonably well, this service can help identify opportunities to improve your nutrition, hydration, and fueling strategy for future events.
What's Included
One 75-minute consultation via Zoom, Google Meet, FaceTime, or phone - athlete preference.
Discussion of factors that may have contributed to your race-day challenges
Practical recommendations to improve future training and racing outcomes
Personalized strategies to reduce the risk of recurring nutrition and hydration issues
Review of recent laboratory work (if applicable and completed within the previous six months).
Ask The Expert
Personalized Guidance When You Need Immediate Answers
Are you concerned you are demonstrating REDs symptoms and you are seeking professional guidance on the next best steps?
Are you struggling with your body image and would like to talk about how to develop a healthier relationship with food?
Are you considering purchasing a new bike or upgrading your current setup and want expert input to ensure your investment is well-informed?*
Are you a coach managing a complex athlete situation and need professional guidance?
Do you have specific questions about nutrition, training, racing, or performance that require expert insight?
Are you looking for help planning your race season or how to navigate the off-season effectively?
Are you a coach, Registered Dietitian in training, or early-career sport dietitian seeking guidance on building and growing your business in the endurance sport space?
Are you considering an extreme triathlon, mountain bike event or stage race and need advice on travel, logistics and gear?
Do you have questions about a specific race course/event?
About This Service
The Ask the Expert consultation is designed for athletes, coaches, and performance professionals who need focused, practical, and timely guidance on a specific challenge or decision. This service provides clear, evidence-based recommendations tailored to your unique situation. Depending on your needs, you will receive expert input from Marni and/or Karel, ensuring you are supported by the most relevant expertise for your topic. Our goal is to help you move forward with confidence by offering actionable strategies rooted in experience, education, and real-world application.
Bike-related consultations are led by Karel.
What’s Included
A detailed questionnaire delivered to your inbox within 24 hours of purchase
One 60-minute consultation via Zoom, Google Meet, or FaceTime - athlete preference
Personalized recommendations and solutions based on your specific goals and challenges
Follow-up resources or handouts via email when applicable
This service is ideal for individuals who need clarity, direction, or a second opinion on a focused topic and want expert support they can trust.
Mitigating GI issues including bloating, gas, belching, stomach, diarrhea, cramping, nausea, headaches, and digestive distress
Helping athletes meet daily energy needs during high-volume training
Bloodwork and sweat testing review
Nutrition strategies for extreme environmental and terrain conditions
Building and maintaining a healthy relationship with food and body
Overcoming body image struggles
Additional Support Is Available
Lasting change often requires ongoing guidance and accountability. If you'd like continued support after your package concludes or we have worked together within the past 12 months, additional follow-up sessions can be purchased and used anytime within 3 months of purchasing.
My goal is to help you develop the knowledge, confidence, and habits needed to fuel your body effectively, not just for your next event, but for years to come.
Step 2:
Read through the commonly asked questions
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Contact me before purchasing a service so I can learn more about your goals, answer any questions, and ensure the selected service is the best fit for your needs. I believe the most successful athlete relationships begin with a conversation. I look forward to learning more about you and how I can be of help.
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Prior to your first consultation, you'll complete a comprehensive questionnaire so that I can gain a better understanding of your current nutrition practices, training routine, nutritional challenges, and relationship with food. This information helps identify opportunities for improvement and creates the foundation for a personalized plan designed specifically for your needs.
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I do not provide nutrition counseling for intentional weight loss. Instead, my focus is on helping athletes properly nourish their bodies to support training, recovery, health, and performance. Proper nutrition is one of the most powerful performance tools available to an athlete. When your body is adequately fueled, hydrated, and nourished, you can train harder, recover better, perform more consistently, and improve your long-term health. Your body may change (in a favorable way) because of improved fueling strategies to support training.
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I do not offer refunds but I do honor your purchase for at least 6 months. If for some reason you are unable to utilize your service immediately after purchasing, we can delay our time together until you are ready (within 6 months of purchasing).
STep 4: Send an email
STep 4: Make your purchase
Registered Dietitian Vs. Nutritionist
Why Work with a Registered Dietitian?
If you're looking to help optimize your daily diet, enhance athletic performance, or support long-term health, working with a Registered Dietitian (RD) is one of the most valuable investments you can make.
Registered Dietitians are the most highly qualified nutrition professionals. While anyone can call themselves a "nutritionist" or earn a nutrition-related certification, Registered Dietitians must complete rigorous education, supervised clinical training, and a comprehensive national credentialing examination. Many also pursue advanced degrees and specialized certifications in areas such as sports nutrition, pediatrics, oncology, renal nutrition, and eating disorders.
For athletes, working with a Registered Dietitian who specializes in sports nutrition provides the expertise needed to safely and effectively align nutrition with training and performance goals. A Board Certified Specialist in Sports Dietetics (CSSD) has advanced training in fueling strategies, hydration, recovery, body composition, energy availability, gastrointestinal concerns, and performance nutrition for athletes across all levels of competition.
Rather than relying on restrictive diets, nutrition trends, or one-size-fits-all plans, a qualified sports dietitian can help you develop a personalized, sustainable approach to eating that supports your health, lifestyle, and athletic ambitions. The goal is not simply to improve performance today, but to build the habits and knowledge that support a lifetime of health, enjoyment, and athletic success.