What Is EWOT? Exercise With Oxygen Therapy Explained

EWOT stands for exercise with oxygen therapy: breathing concentrated oxygen through a mask while doing light-to-moderate exercise. It has become popular in gyms and wellness studios, and many claims are made about it. This guide explains where EWOT came from, how it is done, what the research actually shows and how it compares with IHHT and HBOT.

By Randall Chesnutt, O₂ Pro Academy · Last updated 2026-10-28

What is EWOT?

In EWOT, a person exercises — usually on a stationary bike, treadmill or rebounder — while breathing oxygen-enriched air through a mask or nasal cannula. The oxygen typically comes from an oxygen concentrator feeding a large reservoir bag, so the person can draw enough enriched air even when breathing hard. Sessions are often short, around 10–20 minutes.

Some modern systems also switch between oxygen-enriched and lower-oxygen air during the session, borrowing the idea of contrast from altitude training. Those protocols are closer to IHHT done during exercise.

Origins: Manfred von Ardenne's multistep oxygen therapy

EWOT traces back to the German physicist and researcher Manfred von Ardenne, who developed what he called Sauerstoff-Mehrschritt-Therapie (oxygen multistep therapy) from the 1960s onward. His approach combined oxygen breathing with light exercise and sometimes supplements, based on his idea that raising blood oxygen during activity could improve circulation and oxygen delivery, especially in older people. He published his work in a book translated into English as “Oxygen Multistep Therapy.”

His ideas were influential in parts of Europe, but much of the original work was not tested in large, controlled clinical trials by today's standards. Modern EWOT marketing often goes well beyond what that early work demonstrated.

How EWOT is done

A typical wellness EWOT session follows a simple structure:

• Screening: health history, contraindications and a check that the client can exercise safely.
• Setup: an oxygen concentrator fills a reservoir bag; the client wears a mask connected to it.
• Warm-up: a few minutes of easy movement.
• Exercise: 10–20 minutes of light-to-moderate effort while breathing the enriched air.
• Cool-down: easy movement and normal breathing, then a check on how the client feels.

What the research does — and does not — show

Breathing extra oxygen during exercise (called hyperoxia in research) has been studied in athletes for decades. A meta-analysis by Mallette and colleagues (2018) found that hyperoxia can improve exercise performance during the session itself, especially in endurance tasks, because more oxygen is available to working muscles. Evidence that training with oxygen produces lasting gains once you go back to normal air is weaker and less consistent.

There are few well-controlled studies of EWOT as it is sold in wellness settings, and claims that it treats or cures disease, removes toxins or reverses aging are not supported by good evidence. A fair way to describe EWOT is: it may let some people exercise more comfortably or at a slightly higher intensity during the session, and it is generally low-risk for healthy, screened people. Beyond that, the evidence is limited.

Start with the Certified Oxygen Performance Specialist™ (COPS™) — $197, self-paced, lifetime certification. Start with COPS™ →

EWOT vs IHHT vs HBOT

These three are often lumped together, but they are different tools.

Setting realistic expectations with clients

Because EWOT is heavily marketed, many clients arrive expecting dramatic results. Practitioners build trust by being specific about what is known. It is reasonable to say that extra oxygen can make a hard effort feel easier during the session and may help some people train a little harder. It is not reasonable to promise that EWOT will cure illness, detoxify the body or replace medical care.

A good habit is to agree on simple, measurable goals before starting — for example, how a set workout feels on a 1–10 effort scale, heart rate at a fixed workload, or the client's weekly BOLT Score — and review them after a few weeks. If nothing has changed, say so honestly and adjust the plan. Clients appreciate a coach who tracks results rather than repeating claims.

It also helps to keep the basics in view. Daily nasal breathing, good sleep, regular movement and healthy CO₂ tolerance affect how well oxygen is delivered every minute of the day, not just during a 15-minute session. EWOT can sit on top of those habits; it cannot replace them.

Safety

EWOT is generally well tolerated by healthy, screened clients, but oxygen is a drug and a fire hazard, so the basics matter.

• Fire safety: keep oxygen equipment away from open flames, heat sources and oil-based products, and never allow smoking nearby.
• Lung conditions: people with COPD or other conditions that cause CO₂ retention can be harmed by high-flow oxygen and need clinician guidance.
• Exercise readiness: anyone with heart disease, chest pain, uncontrolled blood pressure or other cardiovascular concerns needs clearance before exercising.
• Equipment: use equipment as the manufacturer intends, keep it clean and follow local rules on oxygen use.
• Claims: describe EWOT as a supportive wellness service, not a medical treatment.

How practitioners use EWOT

Gyms, recovery studios and wellness clinics usually offer EWOT as a short add-on to training or as part of a recovery package. Good practitioners screen clients, explain realistic expectations, track simple measures like heart rate, perceived effort and the BOLT Score, and combine EWOT with the breathing basics that matter every day — nasal breathing and good CO₂ tolerance.

To use EWOT responsibly, practitioners need a solid understanding of oxygen physiology and breathing. That is the focus of the Certified Oxygen Performance Specialist™ (COPS™) course, which also prepares you to compare EWOT with altitude and hyperbaric options — see our IHHT vs HBOT guide.

This is educational, not medical advice. Oxygen and altitude-based services are not a substitute for diagnosis or treatment by a licensed clinician. Anyone with a heart, lung, blood, neurological or other serious medical condition, or who is pregnant, should get clinician guidance first.

Frequently Asked Questions

What does EWOT stand for?

EWOT stands for exercise with oxygen therapy — breathing oxygen-enriched air through a mask while doing light-to-moderate exercise.

Who invented EWOT?

EWOT is based on the oxygen multistep therapy developed by German researcher Manfred von Ardenne from the 1960s onward, which combined oxygen breathing with light exercise.

Does EWOT really work?

Research shows that breathing extra oxygen can improve exercise performance during the session itself. Evidence for lasting benefits and for many wellness claims is limited, and EWOT should not be presented as a treatment for disease.

Is EWOT the same as IHHT?

No. EWOT adds oxygen while you exercise. IHHT alternates lower- and higher-oxygen air while you rest. Some systems combine the two ideas, but they are different protocols.

Is EWOT safe?

For healthy, screened people it is generally low-risk. People with COPD or CO₂ retention, heart disease or other serious conditions need clinician guidance, and oxygen equipment requires strict fire-safety practices.

O₂ Pro Academy credentials (COPS™, CAT™, CHT™, CBS™, CVS™) are private professional training credentials issued by O₂ Pro Academy (Spoken About Media, LLC). They are not government licenses and do not expand anyone's legal scope of practice.

Start with COPS™ — $197 · IHHT vs HBOT Compared

• Certified Oxygen Performance Specialist™ (COPS™) — The foundation course in oxygen science.
• IHHT vs HBOT — Altitude therapy vs hyperbaric oxygen compared.
• What Is Altitude Therapy? — Simulated altitude and IHHT explained.
• BOLT Score Test & Calculator — Track breathing efficiency in 60 seconds.