About Karie

Smiling woman with long hair wearing a green vest and black shirt.

Karie Marsh, SLPD, CCC-SLP

Licensed Speech-Language Pathologist & Functional Breathing Instructor with a specialized focus on the treatment of EILO


  • Doctor of Speech-Language Pathology (SLPD)
  • Clinical Research on EILO
  • Certified Buteyko Breathing Instructor
  • Advanced Oxygen Advantage Instructor
  • P.I.E. Approach to EILO - Level 1 Trained

The Story Behind Functional Airway Lab

"I had EILO before I knew what it was."

For years, Karie experienced exactly what her patients describe — exercise-induced breathlessness at peak effort that was hard to explain and even harder to treat. That personal journey became the foundation of Functional Airway Lab, and it shapes everything she does.

Karie didn't just study EILO. She lived it, treated it, and resolved it — using the same integrated methods she now brings to every athlete she works with. That combination of lived experience and advanced clinical training is rare. 

The Beginning: An Athlete Who Couldn't Understand Her Symptoms

Karie's experience with exercise-induced breathlessness began in adolescence. At peak effort, she'd feel throat tightness, noisy breathing, and the unsettling sense of not being able to get air in — symptoms that would resolve quickly after stopping activity. Sound familiar?

Like many athletes, she had a hard time putting words to what she was feeling, and providers she saw didn't yet have a clear explanation for it. She kept training. The questions kept coming. She held on to the belief that answers existed — she just hadn't found them yet.

The Discovery: Finding The Answer In Clinical Training

When Karie pursued speech-language pathology, she was introduced to exercise-induced laryngeal obstruction (then more commonly called vocal cord dysfunction or paradoxical vocal fold motion). She recognized it immediately — this was what she had been experiencing throughout her athletic career.

She began applying the respiratory retraining techniques central to SLP practice for EILO. They made a difference, but didn't fully resolve her symptoms. This deepened her curiosity: what would it look like to go even further, to address not just the mechanics but the full picture of how breathing works as a system?

The Doctorate: Returning To Research What She Had Experienced

Karie completed her clinical doctorate in speech-language pathology at Rocky Mountain University of Health Professions, focusing her research specifically on EILO in adolescent and young adult athletes. Her clinical background gave her a strong foundation. She left with new questions, a deeper evidence base, and a drive to keep building on what SLP practice had already given her.

The Resolution: An Integrated Approach

While completing her doctorate, Karie pursued advanced training in functional breathing retraining — becoming a Certified Buteyko Breathing Practitioner and an Advanced Oxygen Advantage Instructor, and completing the P.I.E. Approach for EILO Level 1.

This work expanded her clinical toolkit, adding breathing mechanics, respiratory chemistry, and nervous system regulation to the laryngeal retraining techniques at the heart of SLP-based EILO care. Together, these approaches form an integrated system — one that goes beyond managing symptoms toward lasting resolution.

Ready to work with a specialist who's been where you are?

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Functional Airway Lab

4532 Telephone Road suite 114, Ventura, CA, USA

(805) 754-7768 karie@functionalairwaylab.com 4532 Telephone Rd., Suite 114 Ventura, CA 93003

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