ABOUT H2O NUTRITION

ANDREA DACEY, RDN, CSSD

Andrea Dacey, RDN, CSSD – San Diego sports dietitian and founder of H2O Nutrition

Sports Nutrition Coaching for Athletes Who Want to Perform, Recover, and Race Better

Personalized fueling and recovery plans for endurance athletes, competitive teams, and everyday performers — built around your training, not a generic template.

CSSD Certified • 15+ Years Experience • San Diego & Boston

Andrea Dacey, RDN, CSSD – San Diego sports dietitian and founder of H2O Nutrition

Andrea Dacey is a Registered Dietitian and Certified Specialist in Sports Dietetics (CSSD) who has spent 15+ years helping athletes train and race with confidence in their fueling. From youth sports to Hyrox and endurance racing, her approach starts with how you actually train — not a generic plan.

 

Common Questions

Frequently Asked Questions

How do I choose a sports nutrition coach?

Look for a Registered Dietitian (RD/RDN) with a Board Certified Specialist in Sports Dietetics (CSSD) credential — this ensures your coach has both clinical nutrition training and sport-specific expertise. Ask about their experience working with your sport and competition level, whether they build individualized plans versus generic templates, and how they coordinate with your coach or medical team.

What questions should I ask a sports dietitian before working with them?

Ask about their credentials (RDN, CSSD), experience with athletes at your level, and how they structure the assessment and coaching process. Find out whether plans are personalized based on testing or built from general guidelines, how often you'll meet, and how they measure progress.

How is a fueling plan personalized for an individual athlete?

Personalization starts with data — resting metabolic rate, training volume, body composition, and event demands — rather than one-size-fits-all calorie targets. Plans are reassessed as training phases and goals shift.

Can sports nutrition coaching actually improve endurance performance?

Yes — proper fueling directly affects glycogen availability, hydration status, and recovery capacity, all of which influence endurance output. Underfueling is one of the most overlooked limiters of performance gains.

How does hydration affect athletic performance?

Even mild dehydration (as little as 2% of body weight) can measurably reduce endurance capacity, strength output, and cognitive focus during competition. A sports dietitian can help build a personalized hydration and electrolyte strategy.

What nutrients support immune health in athletes?

High training loads can temporarily suppress immune function, making adequate protein, vitamin D, zinc, and overall energy availability especially important. Underfueling is a common driver of frequent illness and slow recovery.

TESTIMONIALS

“I was so excited to meet Andrea because she tailors a program around my body type. I started with training sessions and actually had fun getting my butt kicked! I’ve also been dealing with digestion problems, so I consulted with Andrea about making adjustments to my eating habits – she has already done more for me than any doctor has. Her recommendations were not only reasonable and well-informed, but following her advice has already changed the way I feel about my body. Andrea’s enthusiasm and positive attitude have been the best motivation – I can’t thank her enough!.”

“Andrea is awesome! I am a former college tennis player that has always enjoyed exercising, but really have not focused enough at all on my diet and eating the right foods. I’m in my early 30s now, and I really need a wake up call, and going to Andrea for advice and coaching on my nutrition was exactly what I needed. She is so positive, so encouraging, and so knowledgeable about what nutrition, exercise, supplements, you name it! I would recommend her to anyone looking to get themselves turned in the right direction with their health.”

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