Mild hyperbaric chambers are showing up in recovery studios, chiropractic offices and homes. They're often marketed with the same claims as medical hyperbaric oxygen therapy (HBOT), but they are not the same thing. Here's what you should know before buying or offering sessions.
Key takeaways
- Mild chambers typically run at about 1.3 ATA, often with room air or an oxygen concentrator. Medical HBOT runs at 2.0 ATA or higher with 100% oxygen.
- A 2019 review describes possible mechanisms and early findings for mild hyperbaric oxygen, but the research base is far smaller than for medical HBOT.
- The FDA warns against claims that hyperbaric chambers treat conditions they're not cleared for.
- The most common side effect of pressurization is ear discomfort.
Mild hyperbaric vs. medical HBOT
Medical HBOT is delivered in hospitals and clinics, usually at 2.0 to 3.0 ATA while breathing near-100% oxygen, for conditions like decompression sickness, carbon monoxide poisoning and certain non-healing wounds. Mild chambers operate at much lower pressure. That lower pressure is why soft-sided chambers are practical for home and studio use, and also why you can't assume medical HBOT results apply.
What research exists on mild hyperbaric
A 2019 review by Akihiko Ishihara in The Journal of Physiological Sciences summarized research on mild hyperbaric oxygen (generally around 1.25 to 1.3 ATA with elevated oxygen). It describes increased dissolved oxygen in the blood, possible effects on metabolism and muscle in animal studies, and early human findings, while noting that more research is needed [1]. Many of the studies are small or in animals.
Our honest summary: mild hyperbaric is a plausible, generally low-risk wellness tool with early research behind it. It is not a proven treatment for any disease, and anyone selling it that way is putting you at risk.
What the FDA says
The U.S. Food and Drug Administration has warned consumers that HBOT has not been cleared for many conditions it's marketed for online, including autism, cancer, diabetes, HIV, Alzheimer's and depression [2]. If you run a studio, keep your marketing to relaxation and general wellness language and never make disease claims.
Side effects and safety
A 2017 review of medical HBOT side effects found middle ear barotrauma (ear pressure and pain) to be the most common issue, with more serious events being rare [3]. At the lower pressures of mild chambers, ear discomfort is still the main thing users notice. Practical tips:
- Learn to clear your ears (swallowing, yawning) as pressure rises.
- Don't use a chamber with a cold, sinus congestion or ear infection.
- Never bring flammable items or devices the manufacturer prohibits into a chamber, especially one using supplemental oxygen.
- Talk with a doctor first, particularly with lung conditions, recent ear surgery or claustrophobia.
What this means for gyms and studios
Hyperbaric sessions are usually 60 minutes, so pricing and scheduling matter more than with quick modalities. Studios often position them as premium add-on sessions. Choose a chamber with clear certifications and safety valves, and train staff on the manufacturer's procedures. See our mild hyperbaric buying guide.
References
- Ishihara A. Mild hyperbaric oxygen: mechanisms and effects. The Journal of Physiological Sciences. 2019;69(4):573-580. doi:10.1007/s12576-019-00678-5
- U.S. Food and Drug Administration. Hyperbaric Oxygen Therapy: Get the Facts. Consumer Update. fda.gov
- Heyboer M, Sharma D, Santiago W, McCulloch N. Hyperbaric oxygen therapy: side effects defined and quantified. Advances in Wound Care. 2017;6(6):210-224. Find on PubMed
The information on this site is for general education and is not medical advice. Talk with your doctor before starting heat, cold, light, pressure, float, PEMF or vibration therapy, especially if you are pregnant or have a medical condition. We may earn a commission when you buy through our links. Learn more.