About this article
Medically reviewed- Written by
- Dr Paul Watson
- Medically reviewed by
- Dr Han Simpson
- Published
- July 13, 2026
- Medical review date
- September 8, 2026
- Evidence searched through
- September 8, 2026
- Next review due
- September 8, 2027
- Intended audience
- General Readers & Patients
- Geographic scope
- Worldwide
- Conflicts of interest
- None declared.
- Funding
- Website Owner
- Report a correction
- Report an error or editorial concern
- Medical disclaimer
- Read the medical disclaimer
Hyperbaric oxygen therapy (HBOT) is a treatment in which you breathe oxygen inside a sealed chamber held at higher than normal air pressure, so your body can take in more oxygen than it would while breathing normally.
The physics behind it
The idea rests on a simple point of physics. At normal atmospheric pressure your red blood cells carry most of the oxygen you breathe, and they are already close to full. Raise the pressure around you and something changes: oxygen starts dissolving directly into the plasma, the fluid part of your blood, in far greater amounts. That oxygen-rich plasma can then reach tissues a normal breath would struggle to supply, including areas where blood flow is poor or swelling has cut circulation.
Pressure inside a chamber is measured in atmospheres absolute, or ATA. One ATA is the pressure you feel at sea level. Hospital HBOT often runs between about 2 and 3 ATA, roughly what you would experience 10 to 20 metres underwater. Recovery studios use much gentler settings, commonly around 1.3 to 1.5 ATA. That gap is why the two uses should not be treated as the same thing.
Why people use it for recovery
Most recovery claims trace back to oxygen delivery and inflammation. Healing tissue, whether a strained muscle or a stubborn wound, needs oxygen to rebuild. When swelling squeezes the local blood vessels, supply drops at the exact point it is needed. Raising the amount of dissolved oxygen in your plasma is one way to keep feeding that tissue while circulation is compromised.
The strongest evidence sits with clinical uses. HBOT has good support for diabetic foot ulcers and other wounds that will not close, and for certain bone and tissue infections. It also helps with problems caused by radiation therapy, and it is the standard treatment for decompression sickness and for carbon monoxide poisoning. These are the indications hospitals and hyperbaric units are built to treat.
General athletic recovery and everyday fatigue are a murkier story, and so is cognitive and brain-injury support. There is reasonable interest in HBOT for traumatic brain injury and stroke rehabilitation, and some encouraging findings, but the research is still developing and results vary between studies. For soft-tissue recovery after hard training, plenty of people report feeling better, though high-quality trials are limited. Lower-pressure wellness HBOT may help you recover and feel more energetic. It will not replace rest, sleep or sensible training loads.
What a session actually looks like
A standard HBOT session usually runs for around 60 minutes, during which you rest inside a sealed chamber while the internal air pressure is gradually raised above normal atmospheric pressure so your body can absorb more oxygen than it would at rest. Dedicated recovery studios now run supervised sessions in soft or hard-shell chambers at modest pressures well below hospital treatment levels. Brisbane recovery and fitness studio TH7 Body Labs, which offers HBOT for athletic recovery and general wellness rather than as a clinical treatment, sets out what a typical session involves across its 60-minute, 1.35 ATA chamber bookings on its facility page. The pressure change affects your ears and sinuses much like descending in an aeroplane, so most providers guide you through simple equalising techniques and will not proceed if you have an untreated ear or chest condition.
Inside the chamber you can usually rest and read while the pressure holds steady. The session ends with a gradual return to normal pressure, again slow enough to let your ears adjust. You do not need to do anything active. The chamber does the work by changing the conditions your body is breathing in.
The benefits people are chasing
The benefits fall into two groups, and it helps to keep them apart. The medical ones are specific and evidence-based: faster wound healing, control of certain infections, and the treatment of diving emergencies and poisoning. These are delivered in clinical settings, at higher pressures, on referral.
The recovery and wellness benefits are what bring most people to a studio. Think improved energy, quicker turnaround between training sessions, reduced feelings of inflammation and soreness, and support for immune and cognitive function. The usual audience is people training hard, managing a demanding schedule, or simply curious about recovery tools. Some of these benefits are backed by early research. Others rest mainly on how people report feeling. That does not make them worthless, but it does mean wellness HBOT is one recovery option among many rather than a guaranteed result.
Who should not use it
HBOT does not suit everyone, and the reasons are mostly mechanical. Because it changes the pressure in air-filled spaces, anyone with a collapsed lung or a recent ear or sinus problem should not use it without medical clearance, and the same applies to certain untreated lung conditions. Pressure that cannot equalise across the eardrum causes pain and injury.
Talk to a doctor before booking if you have a chronic lung condition such as emphysema, a history of ear surgery, uncontrolled seizures, a fever, or if you are pregnant. Some medications and recent surgeries also matter. A responsible provider will ask health-screening questions before your first session and turn you away if a session is not safe for you. If you are considering HBOT for a diagnosed condition rather than general recovery, that decision belongs with your treating doctor, who can tell you whether clinical HBOT at the right pressure is appropriate.
How often to go
Frequency depends entirely on why you are using it. Clinical HBOT for a wound or infection is prescribed as a course, often daily sessions over several weeks, at a pressure and schedule set by a hyperbaric unit. That is a medical treatment plan, not something you self-manage.
For recovery and wellness use there is no fixed rule, and any studio quoting you a strict number is guessing. Many people who use lower-pressure sessions go once or twice a week, or cluster them around heavy training or travel, and judge the value by how they feel over time. A first visit really only tells you one thing: whether you tolerate the pressure comfortably before you commit to more. As with most recovery tools, consistency and how it fits your wider routine matter more than any single session.
So weigh HBOT up as a recovery aid to test rather than a fix to lean on, get medical clearance if any of the conditions above apply to you, and keep the wellness version and the hospital version clearly separate in your mind.