Who We Work With
One assessment system, three ways to use it.
Clinics & Performance Centers
Offer metabolic and respiratory health assessments in your clinic. We train your team, analyze every test and provide the follow-up program.
Individuals
Learn your VO2 max, resting metabolic rate and fuel use, then follow a plan built on your own numbers.
Athletes & Teams
Onsite breathing training for coaches and athletes, from youth to pro, with optional VO2 max testing.
What a Metabolic Health Assessment Shows
Every breath carries information about how your body produces energy. A portable metabolic analyzer measures it breath by breath, at rest and during exercise, so you see how your heart, lungs and metabolism work together.
- VO2 max: how much oxygen your body can use at peak effort
- Resting metabolic rate: how many calories you burn at rest
- Metabolic flexibility: how well you switch between burning fat and carbohydrate
- Breathing efficiency: how your breathing changes as effort rises
- Training zones: built from your data, not age formulas
Assess. Identify. Optimize. Reassess.
The O2Max method, from first test to measurable progress.
1. Assess
A metabolic and respiratory health assessment at rest and during exercise.
2. Identify
We pinpoint what is limiting your fitness: oxygen delivery, fuel use or breathing.
3. Optimize
A personalized program with training zones, breathing work and recovery guidance.
4. Reassess
Retest after 8 to 12 weeks to see exactly what changed.
Built for Clinics and Performance Centers
O2Max partners with integrative, longevity and performance clinics across the U.S. and Canada. We train your staff, analyze every assessment and provide a program your clients can follow, so your clinic can offer advanced metabolic testing without building it from scratch.
- Onsite launch and staff training
- Expert analysis and client-ready reports
- A wholesale VO2 Max Optimization Program you can offer your clients
- Retesting to show measurable progress
Meet Gilles Essiembre
Founder of O2Max and a specialist in metabolic and respiratory performance, Gilles has spent more than a decade helping athletes, clinics and everyday clients understand what their breath says about their fitness.
His approach is simple: don’t just measure VO2 max, find out why it is where it is, then train the systems that move it.
From the Resources Library
What Is a Metabolic Health Assessment?
What is measured, how the test works and who it is for.
VO2 Max and Longevity
What large studies say about cardiorespiratory fitness and long-term health.
RMR vs. BMR
Two ways to describe your resting metabolism, and why measuring beats estimating.
Find Testing Near You
O2Max assessments are offered through partner clinics. See which clinics test in your state, then send a request straight to the clinic.
Book Your Health Assessment
Start with a free discovery call. We will find the right option for you, your team or your clinic.