Registered Dietitian Nutritionists
Fueling CrossFitters to
Optimize Your Health & Performance,
Master Macros,
& Achieve Ideal Body Composition
Often At No Cost!
Virtual Insurance Covered Nutrition
Are you CrossFit Serious or CrossFit Causal?
Whether you're eyeing the podium at your next comp or aiming to stay injury-free for the long haul, we tailor nutrition to fuel your goals.
For the Competitive Edge
CrossFit Serious – FUEL to Win
Nutrition can make a "good" athlete "great" or a "great" athlete "good"
Do you worry that your nutrition might be holding back your true potential?" Having a CrossFit-savvy dietitian in your corner to will help you reach new PRs, and climb the podium and leaderboard.
Our expert Dietitians are CrossFit athletes themselves, and know firsthand the unique demands of your training. With tailored meal plans, precise macros, and ongoing support, they’ll help you achieve peak performance, optimize recovery, and maintain the stamina to crush every workout, giving you the competitive edge!
Photo Credit: @blackrambophoto
CrossFit Casual – FUEL to Feel Strong, Energized and Injury-Free
Nutrition keeps you doing the things you love
Are you a focused on overall health, improved energy, strength, and endurance and want to ensure you continue to do what you love by staying injury-free?
We help you feel energized not exhausted during and after your workouts and help you recover quickly. You'll learn how to fuel before, during and after your WODs to feel and look your best —without feeling restricted.
The Best of Both Worlds – FUEL to Achieve Balance and Sustainable Results
Feel Your Best, Whether You’re All-In or Taking It Easy
Do you feel you it's a hard balance between between pushing your limits and maintaining a balanced approach to fitness? It doesn't have to be!
Whether you're toggling between competition prep and off-season maintenance or simply training for fun our dietitians create tailored nutrition plans that adapt as your focus shifts. We'll help you feel your best and keep you on track—without sacrificing the foods you love.
Why CrossFitters Choose Us?
Insurance covered virtual one on one nutrition and macro planning to optimize performance, recovery and overall health often at no cost.
Expert guidance from Registered Dietitian Nutritionist who are experienced CrossFitters themselves who have extensive expertise and education in sports performance nutrition.
Interactive resources, community, accountability and support with our RX Fitness FUEL membership and accountability program to deepen your understanding and commitment to get to your results sooner and build long term sustainable habits.
Photo Credit: @jordan.t.levin
We are Registered Dietitian Sports Nutritionists At Your Fingertips Often At No Cost!
No matter if you're a serious competitor aiming to win or a casual athlete focused on long-term health, our Registered Dietitian Nutritionists are here to guide you.
Ready to fuel your journey?
Contact us today for a personalized consultation and discover how you can feel your best at every stage of your CrossFit journey.
Our Dietitians Who CrossFit
At RX Nutrition and Fitness, our dedicated professionals are committed to empowering you by optimizing your athletic performance, avoiding injury, and achieve peak fitness by learning to fuel with the right foods at the right time.
Marley Oldham Carnes
Founder & CEO
Registered Dietitian Nutritionist
CrossFit L-2 Coach
Area of Expertise:
Body Composition
Macros
Biometric Optimization
Jennifer Holmes
Registered Dietitian Nutritionist
Registered Nurse
Area of Expertise:
Body Composition
Competition Preparation
Medical Nutrition Therapy
Leron Sarig
Registered Dietitian Nutritionist
Board Certified Specialist in Sports Dietetics
Area of Expertise:
Body Composition
Professional & Youth Athletes
Optimal Hormonal Balance for Women
Chen Du
Registered Dietitian
Specializing in Sleep and
Nutrition for CrossFitters
Area of Expertise:
Body Composition Optimization
Sleep Optimization for Athletes
Cognitive Behavior Therapy for Insomnia
Nutrition for Injury Prevention and Recovery
Katie Breazedale
Registered Dietitian
Specializing in Nutrition for Military and First Responders
Area of Expertise:
Weight Loss and Weight Management
Tactical Nutrition for Military Personnel and First
Responders
Gut Health and Gastrointestinal Issues
Women’s Health
Chronic Disease Management
Frequently Asked Questions
Why should I work with a Registered Dietitian Nutritionist?
Partnering with a Registered Dietitian Nutritionist (RDN) will transform your health journey. We offer personalized nutritional care that addresses your unique needs and goals. With a focus on both dietary choices and lifestyle habits, we will provide you a holistic approach that fosters sustainable changes for your improved health, well-being, and performance. We specialize in tailoring your nutrition and meals plans for your specific macros you need to fuel your workouts to perform better, recover faster, and reach your ideal body composition.
What does insurance cover?
Insurance covered time spent in nutrition sessions with your dietitian. Therefore, any requests for meal plans, macros, grocery lists, food log reviews, etc. are completed in session with you which also allows our dietitians to provide better feedback and food/meal plans that are tailored to your specific preferences and needs.
What is your pricing if my insurance doesn't cover sessions or I don't have insurance?
Most of the time, NOTHING with your insurance plan! We rarely see self-pay patients, but if for some reason you do not have insurance, our self-pay rates are $190 for a 90-minute initial session and $90 for a 60-minute follow-up session. We offer discounted pricing for more frequent visits and shorter visits.
What is RX FUEL membership program?
It is a membership portal and educational course that allows you to connect with others for added accountability and motivation, stay on top of the latest trends, fads with new content and receive evidenced based recommendations by our expert sports dietitians. Learn more here.
How long are nutrition virtual sessions?
Initial Visit: 90 minutes
Follow Up Visits: 60 minutes
However, depending on your schedule and accountability needs, you may schedule 30, 45, 60, or 90-minute follow-up sessions as determined with your dietitian at your initial visit.
How often do I meet with my Dietitian?
Our most successful athletes meet regularly with their dietitian. Some do really well with a weekly visit for 15–30 minutes for an accountability check-in, while others enjoy a little more direction followed by a hands-off approach. Usually, we suggest weekly visits for the first six weeks, then once or twice a month after that. Our clients usually view our visits as preventive and continue with us for quarterly check-ins even after they have met their fitness and body composition goals.
We Have Worked with Thousands of Athletes: Here Is What They Are Saying
Guillermo P.
North Frisco CrossFit
"I have worked Marley and her team for over 4 years. Through recurring nutrition sessions and the added accountability, I was able to improve my annual lab work results drastically, become leaner, while also improving in my workouts and with more energy! We analyzed my intake and tailored my macros to the specific demands of the programming cycles, competitions, optimizing recovery healing and preventing injury with the right nutrition.
Shanna M.
Sanctum CrossFit
“I know what healthy eating looks like but I felt like I never had the time to cook or meal prep consistently.
I found myself grabbing the kid's snacks or the air fryer chicken nuggets to eat quickly before my next Zoom meeting.
RX Nutrition and Fitness has been given me practical tips and time saving strategies to find a combination of both convenience and health even on the busiest days. "
Amanda S.
Sanctum CrossFit
"RX Nutrition and Fitness has been absolutely phenomenal in assisting me with reaching my specific goals related to CrossFit.
I had been experiencing a plateau in my gym performance and overall progress, but ever since I began working with a Registered Dietitian from their team, I am consistently SEEING and FEELING tangible progress every single day!"
What is a CrossFit Medical Society™ Provider?
The CrossFit Medical Society™ (CFMS) is an organization dedicated to bridging the gap between CrossFit training methodologies and medical practice.
As a proud provider for CFMS, we foster a proactive approach to wellness. We help you regain control of your health by collaborating with other like minded medical professionals that understand the unique health needs for CrossFitters.
Our affiliation ensures we remain at the forefront of best practices and evidence-based nutrition, empowering athletes to optimize their training, recovery, and overall well-being.
Together, we are redefining healthcare.
To learn more about the CrossFit Medical Society website click here.
TEXT: 469-300-1392
