Intermittent Hypoxic-Hyperoxic Training — IHHT

What if stress isn't the enemy?

We all have stress.

Work.

Family.

Exercise.

Injury.

Poor sleep.

Illness.

Deadlines.

Traffic.

Life.

And we're constantly told the solution is to reduce stress.

Meditate more.

Work less.

Sleep eight hours.

Take a vacation.

Put your phone away.

And those may all be excellent ideas.

But there's one problem.

You're never going to eliminate stress from your life.

Your body wasn't designed for that anyway.

It was designed to do something much more remarkable.

Respond to stress.

Adapt to it.

And then…

recover from it.

Which raises a completely different question.

What if the problem isn't simply how much stress you have?

What if part of the problem is how well your body can adapt to it—and how efficiently it can return to recovery?

That question is one of the reasons I brought IHHT to NeuroBalance.

First, Let's Talk About Altitude

If you've ever traveled to the mountains, you've already experienced the basic biology.

At higher altitude, less oxygen is available with each breath.

Your body notices.

Immediately.

Breathing changes.

Heart rate may change.

Blood vessels respond.

And with repeated or prolonged exposure, the body begins adapting.

That's why athletes have trained at altitude for decades.

They aren't trying to deprive their bodies of oxygen because oxygen is bad.

Quite the opposite.

They're deliberately creating a physiological challenge.

And the body responds to that challenge.

That's adaptation.

Now Imagine Bringing the Mountain to You

IHHT stands for:

Intermittent Hypoxic-Hyperoxic Training.

That's a mouthful.

The concept is much easier.

You relax in a chair and breathe through a mask.

For a controlled period, the oxygen concentration in the air you breathe is reduced.

Your body responds.

Then the machine transitions you into an oxygen-rich recovery phase.

Your oxygen saturation recovers.

Then we repeat the cycle.

Challenge.

Recover.

Challenge.

Recover.

All while you're sitting comfortably.

No mountain required.

Why Would Anyone Deliberately Breathe Less Oxygen?

Excellent question.

Because the right amount of stress can make biological systems stronger.

Exercise is stress.

When you lift a weight, you're deliberately stressing muscle.

The muscle responds.

Recovery occurs.

And eventually you become stronger.

Heat is stress.

Cold is stress.

Fasting is stress.

Altitude is stress.

Your biology doesn't necessarily become more capable because we protect it from every challenge.

It becomes more capable by responding appropriately to challenges—and then having an opportunity to recover.

This general idea is sometimes described as hormesis:

A controlled challenge can trigger an adaptive response.

And that's where IHHT becomes fascinating.

What if we could use oxygen itself as a carefully controlled training stimulus?

Your Cells Notice Oxygen

Oxygen isn't simply fuel arriving in the background.

Cells have sophisticated systems for sensing oxygen availability and responding when it changes.

One of the most important involves hypoxia-inducible factors, often abbreviated HIF.

When oxygen availability decreases, HIF-related signaling can influence genes involved in adaptation to lower oxygen availability, metabolism, vascular responses and cellular survival.

Then something else happens when oxygen returns.

The transition between lower oxygen and reoxygenation creates another set of cellular signals, including changes involving reactive oxygen species.

That sounds bad because most of us have been taught:

Oxidative stress = bad.

But biology is rarely that simple.

Small, controlled changes in reactive oxygen species can also function as signals.

They can activate adaptive pathways—including pathways associated with the body's own antioxidant defenses.¹

Once again:

Challenge → signal → response → adaptation.

That's the part that interests me.

What if oxygen is doing more than keeping you alive?

Obviously you need oxygen.

But the interesting part of IHHT isn't simply oxygen itself.

It's the change in oxygen availability.

Lower.

Recover.

Lower.

Recover.

Each transition gives the body information.

And repeated exposure asks the body to respond again and again.

Think about exercise.

One repetition doesn't make you fit.

One workout doesn't transform your body.

The benefit comes from repeated exposure to an appropriate stimulus followed by recovery.

IHHT applies that same basic principle to oxygen availability.

We're not exercising the way you normally think about exercise.

But biologically…

we're asking your system to practice responding.

And You Do It Sitting Down

This is one of the strangest—and most interesting—parts.

You aren't running on a treadmill.

You aren't climbing a mountain.

You aren't doing burpees.

You're sitting in a comfortable chair wearing a mask.

Yet your physiology is being challenged.

Research has examined intermittent hypoxic and hypoxic-hyperoxic conditioning in older adults, cardiac rehabilitation, metabolic conditions, cognitive function and physical performance.²

A systematic review of controlled human studies found improvements in outcomes including exercise tolerance, peak oxygen uptake and global cognitive function in some studied populations, although the authors emphasized that the studies were small and heterogeneous.²

A separate systematic review and meta-analysis in cardiovascular patients reported improvements in resting heart rate and blood pressure following intermittent hypoxic or hypoxic-hyperoxic conditioning, with no significant complications or serious adverse events attributed to the interventions in the included studies.³

Promising?

Absolutely.

Finished science?

Not yet.

And I think that distinction matters.

Because I'm Not Interested in Selling You Magic

IHHT is unusual.

It looks futuristic.

It would be very easy to surround it with exaggerated claims.

That's not what interests me.

What interests me is that the underlying physiology is real.

Humans adapt to oxygen availability.

We have cellular systems specifically designed to detect changes in oxygen.

Those changes initiate biological responses.

And researchers are actively investigating how controlled intermittent exposure might be used therapeutically and for performance.

That's enough to make me pay attention.

Especially because it fits something I've observed clinically for nearly 30 years:

People don't all respond to stress the same way.

You've Seen This Yourself

Two people can go through the same difficult week.

One bounces back.

The other is exhausted.

Two people can perform the same workout.

One feels great the next day.

The other takes four days to recover.

Two people can have similar injuries.

One heals quickly.

The other struggles for months.

Two people can receive the same treatment.

One changes rapidly.

The other barely moves.

What's different?

There are obviously many possibilities.

Age.

Sleep.

Nutrition.

Fitness.

Health history.

Genetics.

Stress.

Movement.

Recovery.

But eventually I became fascinated with a broader question:

How adaptable is this person?

Because health isn't simply the absence of stress.

Life will keep providing stress.

Maybe part of health is having enough physiological reserve to respond to it…

…and enough recovery capacity to come back.

What Does the Research Actually Show?

This is still an emerging field.

And I want to be clear about that.

The evidence isn't remotely as mature as the research behind exercise, for example.

But there are intriguing findings.

In a randomized controlled trial involving older cardiac patients with additional health conditions, five weeks of IHHT improved cardiorespiratory fitness from baseline and produced results comparable to an eight-week exercise-based rehabilitation program in that small study.⁴

In another randomized trial involving adults with metabolic syndrome, three weeks of intermittent hypoxic-hyperoxic exposure produced significant reductions in systolic and diastolic blood pressure compared with the control group.⁵

A randomized trial in geriatric patients found greater improvements in cognitive testing and six-minute walking performance when IHHT was added to a multimodal training program compared with multimodal training plus sham exposure.⁶

And systematic reviews of intermittent hypoxia protocols have reported promising findings involving cognitive function and brain-health measures in older adults.⁷

Most recently, a 2026 systematic review and meta-analysis specifically examined intermittent hypoxia-hyperoxia in adults with musculoskeletal dysfunction and reported improvements across pain, general-health and functional-mobility outcomes.⁸

Again:

Interesting isn't the same thing as proven.

But there's enough here that I want this technology available to my patients.

What About Athletic Performance?

Here's another place where we have to resist oversimplifying the story.

Hypoxic training has a long history in sports.

But that doesn't mean every hypoxic protocol automatically improves performance.

Recent reviews have reached different conclusions depending on the type of hypoxic exposure, population and training method.

Some analyses have found improvements in aerobic and anaerobic performance across intermittent-hypoxia protocols.

Others have found no meaningful advantage for certain forms of aerobic hypoxic training compared with training in normal oxygen.

That's important.

Because IHHT isn't magic altitude training.

The protocol matters.

The dose matters.

The person matters.

The goal matters.

And the adaptive response matters.

Which, interestingly enough, is exactly the philosophy behind the Muhr Method.

This Is Why I Measure Your Response

I don't want to simply put a mask on you and push a button.

During IHHT, your oxygen saturation is monitored.

The system watches how your body responds when oxygen is reduced.

And it watches how you recover when oxygen is restored.

That gives us something much more interesting than simply knowing that you completed the session.

We can watch adaptation happening in real time.

How long does it take your oxygen saturation to decrease?

How does your body tolerate the challenge?

How quickly do you recover?

Does that response begin changing after repeated sessions?

Now we're no longer simply doing a treatment to you.

We're observing how your body responds to a controlled challenge.

That's very NeuroBalance.

But Here's Where IHHT Became Bigger Than IHHT for Me

Remember the premise?

Challenge. Recover.

IHHT gives me an unusual way to challenge physiology.

But challenge without recovery isn't the goal.

That's just more stress.

So what happens after we've asked your system to adapt?

We give it an opportunity to recover.

And that's where another part of the Muhr Method becomes especially interesting.

NuCalm.

IHHT and NuCalm approach the same problem from opposite directions.

IHHT says:

Let's create a controlled physiological challenge.

NuCalm says:

Now let's create conditions designed to help you downshift.

Challenge.

Recover.

Stress.

Adapt.

Return.

Again and again.

That's not an accident.

It's one of the central ideas behind the Muhr Method.

Think About What Most of Us Do Instead

We wake up.

Coffee.

Traffic.

Work.

Phone.

Email.

Problem.

Problem.

Problem.

More coffee.

Workout.

More work.

News.

Alcohol.

Scrolling.

Bed.

Wake up.

Repeat.

Our bodies were designed to respond to stress.

But historically, stress had an ending.

The threat passed.

The chase ended.

The body returned toward recovery.

Modern life can feel very different.

What happens when the challenge keeps coming but recovery never quite catches up?

Poor sleep.

Persistent tension.

Slower recovery.

Low energy.

Brain fog.

Aches and pains that seem harder to shake.

Feeling like you're running on fumes.

None of those symptoms proves that your “stress system” is broken.

But taken together, they raise a question I think is worth asking:

How well are you recovering from your life?

Why I Added IHHT to the Muhr Method

I spent most of my career working primarily with the mechanical and neurological side of the body.

And I still believe deeply in that work.

The adjustment remains at the center of what I do.

But eventually I realized something.

I can deliver an excellent adjustment.

I cannot remove your job.

I cannot remove your family stress.

I cannot make you twenty-five again.

I cannot guarantee eight perfect hours of sleep.

I cannot eliminate every physical, chemical and emotional demand your body encounters.

So I became interested in another possibility.

What if instead of trying to remove every stressor, we could also work on adaptability?

That question eventually led me to IHHT.

This Is Where the Muhr Method Starts Looking Different

The adjustment gives the body a powerful mechanical and neurological input.

Mobility work prepares movement.

Shockwave challenges stubborn tissue.

Photobiomodulation supports cellular processes involved in recovery.

IHHT deliberately challenges physiological adaptability.

NuCalm creates an opportunity to shift toward recovery.

And measurement helps us determine whether we're actually changing anything.

Different tools.

Different inputs.

One body.

Remember:

Your biology doesn't care which professional category a treatment belongs to.

It responds to what we ask it to do.

Can I Just Try IHHT?

Absolutely.

In fact, I expect some people will walk through the door simply because this sounds fascinating.

I understand.

I thought it was fascinating too.

Maybe you're interested in performance.

Maybe you're interested in healthy aging.

Maybe recovery isn't what it used to be.

Maybe you've read about altitude training, hypoxic conditioning or mitochondrial health.

Or maybe you're simply curious about what happens when your body experiences a controlled oxygen challenge.

Come try it.

You don't have to enroll in the complete Muhr Method.

But don't be surprised if I ask you a bigger question while you're here.

Not simply:

“What's wrong with you?”

But:

“What would you like your body to become better at?”

Because that's a much more interesting place to begin.

What if health isn't just about avoiding what's bad for you?

Eat better.

Exercise.

Sleep.

Reduce stress.

All good advice.

But maybe there's another piece.

What if health also means maintaining the ability to adapt?

To be challenged.

To respond.

To recover.

And then to be ready for the next challenge.

Because life isn't going to stop asking things of you.

What if we could help your body become better at answering?

That's why IHHT is here.

And that's why it's part of the Muhr Method.

Explore IHHT →

Explore the Complete Muhr Method →

Research

1. Hyperoxia-enhanced intermittent hypoxia conditioning: mechanisms and potential benefits.
Review of proposed mechanisms underlying intermittent hypoxia and hypoxia-hyperoxia conditioning, including HIF signaling, reactive-oxygen-species signaling and activation of endogenous adaptive pathways.

2. Effects of Intermittent Hypoxia-Hyperoxia on Performance- and Health-Related Outcomes in Humans: A Systematic Review.
Systematic review of controlled human studies. Eight studies met inclusion criteria. Reported findings included improvements in exercise tolerance, peak oxygen uptake and global cognitive function in several studied populations; substantial heterogeneity and the small evidence base prevented meta-analysis.

3. Safety and Efficacy of Intermittent Hypoxia Conditioning as a New Rehabilitation/Secondary Prevention Strategy for Patients with Cardiovascular Diseases: A Systematic Review and Meta-analysis.
Fourteen studies involving 431 participants. Intermittent hypoxia and IHHT were associated with reductions in resting heart rate and blood pressure. No significant complications or serious adverse events attributable to the interventions were reported in the included studies.

4. Intermittent Hypoxia-Hyperoxia Conditioning Improves Cardiorespiratory Fitness in Older Comorbid Cardiac Outpatients Without Hematological Changes: A Randomized Controlled Trial.
Thirty-two older cardiac outpatients were randomized to five weeks of IHHT or an eight-week exercise rehabilitation program with sham hypoxic exposure. Cardiorespiratory fitness improved significantly from baseline in the IHHT group and was not significantly different between groups after intervention.

5. Intermittent Hypoxic-Hyperoxic Exposures Effects in Patients with Metabolic Syndrome: Correction of Cardiovascular and Metabolic Profile.
Randomized controlled trial involving 65 patients with metabolic syndrome. Three weeks of IHHE produced significant reductions in systolic and diastolic blood pressure compared with control.

6. Intermittent Hypoxic-Hyperoxic Training on Cognitive Performance in Geriatric Patients.
Randomized controlled trial involving 34 geriatric patients. Adding IHHT to multimodal training resulted in significantly greater improvements in cognitive testing and six-minute walking performance compared with multimodal training plus sham exposure.

7. Effects of Intermittent Hypoxia Protocols on Cognitive Performance and Brain Health in Older Adults Across Cognitive States: A Systematic Literature Review.
2024 systematic review found promising effects of IHT and IHHT on cognitive function and brain-health measures in older adults while emphasizing the limited number of available studies.

8. Effectiveness of Intermittent Hypoxia-Hyperoxia Therapy for Pain and General Health in Adults with Musculoskeletal Dysfunctions: A Systematic Review and Meta-analysis.
2026 systematic review and meta-analysis examining IHHT in adults with musculoskeletal dysfunction. Reported improvements in pain, general health and functional mobility while emphasizing the need for further research.