Breath coaching & speaking with Dr. David Deppeler, PT, DSc
Train your breath for the life you want
Manage stress. Support performance.
Understand your breathing. Chose the right practice. Track what helps.
Breath Fitness Score
Discover more about your breath function with this 7-Minute online assessment and receive your FREE personalized information
What if you could operate at an entirely different level?
Optimize Brain Function
Increase Stamina
Live bigger
One-to-one breath coaching starts with two questions: What do you notice about your breathing, and what would you like to change? Together, we assess how you breathe – from movement and mechanics to breathing chemistry and the connection between breath and mind. When appropriate, CapnoTrainer® technology measures your exhaled carbon dioxide, helping us see how your breathing responds in real time. We use what we learn to choose practices, adjust the challenge, and track what helps. You build skills you can use where they matter: while talking, moving, exercising, or navigating a stressful day.
Together we train the breath habit & unlock your full potential.
Results Speak for Themselves
Physician & Health Enthusiast
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.
Irene Hoepfel
Austria
Runner
Sabrina Southerland
US
Running
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.
Cameron Levins
Canada
Running
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!
Brittany Peterson
Boise, Idaho
Running
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.
Tristan Woodfine
Canada
Health Enthusiast
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.
Jayne Cronlund
Portland, OR
Masters Swimmer
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.
Stéphanie Wahab PhD
Health Professional
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.
Terri Brancewicz Nichols
Blacksburg, Virginia
Health Enthusiast
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!
Andrew Anema
Fort Collins, CO
Health Enthusiast
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.
Michael Ewing
Portland, OR
Professional Events
Find your focus. Bring your best.
David’s keynotes and workshops turn breathing science into practical tools for work and everyday life. Audiences learn how to use their breath to manage stress, shift gears, and support performance.
Choose an established talk or build something together shaped around your audience and goals.
About Dr. David Deppeler
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