Get to Know Our Team of Dietitians Who CrossFit
Our Sports Dietitian Nutritionists are dedicated to crafting personalized nutrition plans that align with your unique goals—whether you're building muscle, leaning out, boosting endurance, improving recovery, or chasing the podium!
Most importantly, they'll help you build a healthy relationship with food, ensuring you perform at your best and feel energized and not beat down from your workout.
Meet our Dietitians Who CrossFit
Joelle Olson
Registered Dietitian Nutritionist
CrossFit & Performance Nutrition
Weight Loss & Weight Management
Meal Calorie, Macro Planning
Eating Disorders & Emotional Eating
Hormonal Health (PCOS, Thyroid and more)
Chen Du
Registered Dietitian Nutritionist
CrossFit & Performance Nutrition
Weight Loss & Weight Management
Meal Calorie, Macro Planning
Sleep & Recovery
Jennifer Holms
Registered Dietitian Nutritionist
CrossFit & Performance Nutrition
Weight Loss & Weight Management
Meal Calorie, Macro Planning
Chronic Disease Management
About Dr. Chen Du
Dr. Chen Du is your dedicated expert in both sleep and nutrition for CrossFit athletes, providing specialized support to enhance performance, optimize recovery, and prevent injury. With an impressive background that includes a PhD in Human Nutrition from Michigan State University, an MPH from Baylor University, and a BS in Dietetics from Iowa State University, Dr. Chen brings both academic expertise and practical experience to the field.
Credentials:
Registered Dietitian Nutritionist
PhD in Human Nutrition
Master of Public Health
Cognitive Behavioral Therapy for Insomnia (CBT-I) Clinician
CrossFit Level 2 Trainer
Experience and Expertise
Dr. Chen has over 15 years of experience working with athletes of all levels, helping them improve performance through a unique approach that combines tailored nutrition and sleep optimization. She has served as a personal dietitian for elite athletes, including Olympic Gold Medalist Chong He, and is a regular speaker on sleep and performance at Power Monkey Camp and CrossFit boxes. Her areas of expertise include CrossFit and sports performance nutrition, body composition optimization, sleep optimization, and injury prevention and recovery.
Proven Success
Dr. Chen’s unique blend of knowledge in nutrition and sleep has helped countless athletes achieve peak performance by focusing on recovery, body composition, and long-term health. Her experience and expertise provide RX Nutrition and Fitness clients with a competitive edge, supporting both their immediate and long-term athletic goals.
Get Started
Ready to elevate your CrossFit performance with the guidance of an expert? Partner with Dr. Chen Du at RX Nutrition and Fitness for personalized strategies that address your sleep and nutrition needs, empowering you to reach peak performance and feel your best every day.
By choosing Dr. Chen Du, you’re gaining a dedicated partner in your journey towards optimal health and athletic success. Contact her today to start your journey!
Joelle Olson
Dietitian Who CrossFits
Certified Strength and Conditioning Coach
About Joelle Olson
Joelle Olson is your dedicated performance and wellness nutrition expert for CrossFitters, strength athletes, endurance competitors, and anyone looking to improve their relationship with food. With a unique blend of clinical dietetics and high-level coaching experience, Joelle brings together advanced knowledge in exercise science, strength and conditioning, and sport-focused nutrition therapy.
She holds a Master’s in Exercise & Sport Science from the University of Wisconsin and a Master of Public Health with a concentration in Sport Nutrition from the University of Michigan. After years of coaching competitive gymnastics and collegiate athletes, Joelle shifted into dietetics to better support the full spectrum of health—from elite performance to emotional eating, disordered eating, and sustainable weight management.
Credentials:
Registered Dietitian Nutritionist
Certified Strength and Conditioning Specialist (CSCS)
Master’s in Exercise & Sport Science — University of Wisconsin
Master’s in Public Health, Sport Nutrition — University of Michigan
Experience and Expertise
Joelle specializes in supporting both athletes and everyday individuals looking to fuel better, perform stronger, and improve their overall relationship with food. Her approach blends performance nutrition with compassionate, evidence-based counseling for emotional and behavioral eating patterns.
Her expertise includes:
Body composition optimization
Sustainable weight loss & metabolism support
Emotional relationship with food
Disordered eating & eating disorder-informed nutrition care
CrossFit & sport performance nutrition
Meal, calorie & macro planning
Pre-/post-workout fueling and hydration
Race/competition day nutrition prep
Joelle is known for creating a safe, supportive environment while helping clients build habits that last—whether the goal is to PR a lift, improve energy, or rebuild trust with food.
Proven Success
With a background in strength coaching and mental-behavioral nutrition counseling, Joelle has supported hundreds of clients in improving both how they perform and how they feel. Her athletes achieve stronger lifts, faster race times, and better recovery, while her general wellness clients find confidence, clarity, and a healthier, more peaceful relationship with food.
Her approach works because she blends clinical expertise with real-life coaching experience, meeting each client exactly where they are.
Get Started
Ready to transform your performance, mindset, or relationship with food? Partner with Joelle Olson for personalized, empathetic nutrition support tailored to your goals—whether athletic, emotional, or metabolic.
With Joelle, you’re not just getting a dietitian. You’re getting a coach who understands the science, the sport, and the human behind the goals.
Jennifer Holmes
Dietitian who CrossFits
Body Composition Specialist
About Jennifer Holmes
Jennifer Holmes, a driving force behind RX Nutrition and Fitness, is a dedicated health professional based in Murfreesboro, TN, who combines her expertise as a Registered Dietitian and Registered Nurse to offer a unique and holistic approach to health and fitness. With a strong educational background and a passion for CrossFit, Jennifer is a CrossFit athlete and well-equipped to help you achieve your health and fitness goals.
Credentials:
Experienced CrossFitter
Registered Dietitian Nutritionist
Registered Nurse
Bachelor of Science in Nursing, Middle Tennessee State University
Bachelor of Science in Nutrition & Dietetics, California State University San Bernardino
Experience and Expertise
Jennifer’s professional journey includes ICU and critical care nursing at Stonecrest Medical Center, where she managed complex patient cases, and extensive experience in providing nutritional counseling for CrossFit athletes. Her dual expertise in nursing and nutrition allows her to create comprehensive, personalized nourishment strategies that address both your fitness goals and overall health needs.
Proven Success
Jennifer’s extensive background in both nursing and nutrition counseling for athletes provides a solid foundation for her work. She has worked with athletes of all fitness types and coached several CrossFit classes including Foundations Classes. Jennifer has competed in several CrossFit competitions and is well versed in performance and recovery nutrition. She finds true joy in walking along side others to help them achieve their nutrition and fitness goals.
Get Started
Are you ready to enhance your CrossFit performance and achieve optimal health? Partner with Jennifer Holmes at RX Nutrition and Fitness for expert guidance and support tailored to your unique needs and goals. Jennifer’s integrated approach ensures that you receive the best of both worlds: medical insight and nutritional expertise.
By choosing Jennifer Holmes, you are not just getting a dietitian or a nurse; you are gaining a partner dedicated to helping you lead a longer, healthier life.
Contact RX Nutrition and Fitness today to start your journey towards better health and peak performance!
States where with insurance covered sessions.
If your state is not listed? View our affordable coaching options at
www.rxfitnessfuel.com
Jennifer Holmes
RDN, RN
• Alabama
• Arizona
• California
• Colorado
• Michigan
• Nebraska
• New Jersey
• Tennessee
• Texas
• Virginia
Chen Du
PHD, RDN, CF-L2
• Arizona
• California
• Colorado
• Michigan
• New Jersey
• Tennessee
• Texas
• Virginia
Katie Breazedale,
RDN
• Arizona
• California
• Colorado
• Michigan
• New Jersey
• Oregon
• Texas
• Virginia
Joelle Olson,
RDN
• Arizona
• California
• Colorado
• Michigan
• New Jersey
• Texas
• Virginia
Marley Carnes,
RDN, CF-L2
• Arizona
• California
• Colorado
• Florida
• Michigan
• Oklahoma
• New Jersey
• New Mexico
• Texas
• Virginia
Insurance Accepted
✓ AETNA
Aetna Commercial (HMO, PPO, POS), & all Aetna parent plans
>>Most plans cover at 10 sessions at healthy BMI (<25), 16 sessions if overweight BMI (25) and 26 sessions if obese BMI (30+).
Aetna Commercial (HMO, PPO, POS), & all Aetna parent plans
>>Most plans cover at 10 sessions at healthy BMI (<25),
16 sessions if overweight BMI (25) and 26 sessions if obese BMI (30+).
✓ BLUE CROSS BLUE SHIELD
Anthem, PPO, Highmark, HMO, & all BCBS parent plans
>>Most plans cover no-cost, unlimited sessions.
✓ CIGNA
Cigna Commercial (HMO, PPO, POS), & all Cigna parent plans
>>Most plans cover no-cost unlimited sessions, sometimes with a limit on number of virtual sessions.
✓ Medicare & Medicare Advantage
To be eligible for 100% coverage, you must have been diagnosed with Diabetes or CKD.
✓ UNITED HEALTHCARE
United Healthcare Commercial (HMO, PPO, POS), & all UHC parent plans
>>Most plans cover no cost, unlimited sessions with an overweight or obese BMI of 25 or more.
***All HMO plans require a referral***
Other plans are accepted, and we offer superbills for reimbursement for out-of-network insurance.
Please allow up to 48hrs to verify your benefits.
We encourage you to schedule your appointment immediately after you submit your insurance information.
If you do not have coverage, then you will be notified before your appointment.
There is no penalty for canceling outside of 24 hours.
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