Expert Breathwork Coach for High Performance & Stress Relief
Modern science meets grounded wisdom. No hype, no extremes, just a professional breathing coach helping you regain control of your nervous system.
Think more clearly
Sleep better
Live bigger
Do any of these
sound familiar?
- The "Nothing Works" Loop: You’ve tried various wellness trends, but the fatigue and stress keep coming back.
- The Comfort Zone Trap: You want to feel better, but "extreme" breathwork feels aggressive or unsafe.
- The Time Crunch: You’re too busy for a three-hour morning routine.
- The Healthy Skeptic: You wonder if "breathwork" is just a buzzword without real substance.
I meet you where you are.
We don’t force the breath; we retrain the habit so that breathing and life get easier.
Breathe Your Truth In 3 Simple Steps...
Step 1. Free Starter Kit
Get a jump on changing how you feel with three foundational practices. Science-backed tools to calm your system without the theatrics.
*No Signup required
Step 2. Discover Your Breath Fitness Score
Kickstart your journey by assessing your current patterns. Our 7-minute quiz provides a clear understanding of where you stand and where you can improve.
Take the 7-Minute Online Breath Quiz now and receive your FREE personalized report
Step 3. Learn More, Own Your Journey
From mini-courses to the 8-week Breath Catalyst intensive, choose the level of depth that fits your goals.
Featured Training
The Optimal Breathing Blueprint
Dive into the foundational mechanics to transform your energy. Learn to measure your own breath fitness and watch your resilience grow as you integrate these practices into your daily routine.
Breathwork
exposed
What Works, What’s Dangerous, and the Right Way to Breathe.
★★★★★
“This book doesn’t just teach you to breathe—it guides you back to the wisdom of your own body.”
— Lee Holden
Bestselling Author of Ready, Set, Slow!
Modern breathwork is everywhere—but what if your breathing is broken? No cold plunge, no breath hold, and no spiritual awakening can fix that.
Dr. David Deppeler has spent decades helping everyone from elite athletes to anxious overthinkers retrain their breath—and their bodies—for real, lasting change.
In this smart, science-backed, and refreshingly human guide, you’ll learn how to:
- Avoid the popular breathwork methods that may be doing more harm than good.
- Reset your body’s breathing habits to boost your mental health.
- Wake up your diaphragm, improve your blood chemistry and enhance your performance
Hear What Others Had To Say
Physician & Health Enthusiast
Irene Hoepfel
Austria
Supercharge Your Workout completely changed how I breathe when I train—natural, powerful, and effortless. Breath Catalyst took that foundation deeper, helping me understand and apply breathing in ways I never imagined. The Qi Gong Subscription ties it all together, giving me weekly practices that keep my body, mind, and breath in sync. BYT isn’t just teaching me to breathe—it’s transforming how I move, train, and live.
Runner
Sabrina Southerland
US
Running
Cameron Levins
Canada
Besides the therapy I had on location with Deppeler, I learned breathing techniques I still use every day. As an elite runner, it has been incredibly important. I felt an immediate change in training and noticed daily improvements. This work has also improved my sleep. I am happy to wake up feeling better.
Running
Brittany Peterson
Boise, Idaho
Working with David at Breathe Your Truth has significantly impacted my athletic career as an ultra runner. David is incredibly knowledgeable on the intricacies of breathing, neurological functioning and athletic performance. His guidance is clear and makes sense, which makes it easy to apply into daily life. I definitely recommend David to other runners, athletes and people with breathing issues in general, as I feel confident he can make a difference, because he did for me!
Running
Tristan Woodfine
Canada
Through David and the courses BYT Run True and The Optimal Breathing Blueprint: Run, I was able to work through an ongoing side stitch issue I was having during races. These courses take a very complex subject and presents the information in a way that is easy to understand. They also provide you with exercises and techniques you can implement on your own that will make a big difference in your health and performance. After working through these courses I was able to develop a breath work practice that I consider an essential part of each day.
Health Enthusiast
Jayne Cronlund
Portland, OR
As a nonprofit staff coach, fatigue and burnout are always factors to find ways to work through. (Nonprofit missions can be all consuming!) BYT gives me and my clients a wide variety of effective breathwork tools to help us do just that. Through dedicated BYT practices, staff are more ready to face the tough challenges in our world and keep on the journey to a more beautiful, equitable and sustainable future.
Masters Swimmer
Stéphanie Wahab PhD
I have enjoyed every moment of engaging my breath in a different way. David is an exceptionally skilled and attentive teacher.
I’ve particularly appreciated the combination of knowledge and practice in the sessions, this way, I’m able to take the information and the activities into my daily life.
As a lifelong swimmer, I’m excited about the impacts of the breath work on my swimming.
Health Professional
Terri Brancewicz Nichols
Blacksburg, Virginia
I approached the information with a bit of skepticism (as I do with most new things) – but the more I did research, as well as the more personal benefit I experienced from the practices, the more enthusiastic I became.
I feel like I apply what I’ve learned literally all day, every day.
Health Enthusiast
Andrew Anema
Fort Collins, CO
The sessions with BYT and the content provided were amazing.
I learn something new with each person that I work with on my health journey, and David may be the most valuable of anyone I’ve worked with in the last 8 years.
I am excited at the thought of how much this breath work is going to improve my quality of life and am eager to continue learning/exploring more!
Health Enthusiast
Michael Ewing
Portland, OR
I was really struggling with my response to stress and some physical issues that were affecting my everyday life.
I was under the impression the breathing techniques I had used in the past were working in my favor.
Within the first ten minutes, I realized there was more to it.
Over the next month, I changed my response to stress with exercise and breathing practices. The difference has been astounding.
Better Breathing is Not a "Hack"
Most people are told to “just take a deep breath” when they’re stressed. But if your underlying breathing mechanics are off, that advice can actually backfire.
As a professional breathing coach with over 30 years of clinical experience, I help you stop guessing. Using the CapnoTrainer® technology, we look at your actual physiological data—your CO₂ levels and breathing habits—to see exactly how your breath is affecting your brain and body. This isn’t mystical shortcutting; it’s evidence-informed retraining for real-world resilience.
Work With David: 1-on-1 Coaching
Personalized Guidance to Master Your Metabolism and Mood. Ready to stop feeling overwhelmed and start performing sustainably? My 1-on-1 coaching is designed for high-performers, clinicians, and overthinkers who want a proven path to breath fitness.