Hyperbaric oxygen: what it does, what to expect & where to try it

Hyperbaric oxygen therapy (HBOT) involves breathing pure or high-concentration oxygen inside a pressurized chamber at atmospheric pressures above normal — typically 1.3–2.4 ATA (atmospheres absolute). Increased pressure dissolves significantly more oxygen into blood plasma than normal breathing allows, delivering oxygen to tissues at concentrations otherwise unachievable. Clinical HBOT (2.0–3.0 ATA, administered by physicians) is FDA-approved for more than a dozen conditions, including wound healing, carbon monoxide poisoning, and decompression sickness. Wellness-grade HBOT — offered at recovery studios and longevity clinics — typically uses soft chambers at lower pressures (1.3–1.5 ATA) and is sought for athletic recovery, anti-aging, long COVID symptom management, and performance optimization. Sessions typically last 60–90 minutes. Hard-chamber HBOT at higher pressures is available at medical facilities and specialized clinics and is generally considered more potent than soft-chamber sessions.

How hyperbaric oxygen works

At elevated pressure, oxygen solubility in blood plasma increases substantially — Henry's Law dictates that dissolved gas rises proportionally with pressure — allowing oxygen to reach hypoxic or poorly perfused tissues that hemoglobin-bound oxygen cannot easily access. Research on HBOT suggests it can stimulate growth factor release, support angiogenesis (new blood vessel formation), and reduce certain inflammatory markers. Early evidence links repeated mild HBOT sessions to benefits for wound healing and tissue repair; its role in athletic recovery and longevity is an active area of research with preliminary supportive findings.

Typical cost: $100–$300 per session.