Who uses HBOT, and why.

Phelps's use of hyperbaric chambers became public during the 2008 and 2012 Olympic preparations. The setup at his training base used a soft-shell chamber configured to simulate elevation through enriched oxygen rather than reduced pressure — the inverse of altitude training but with overlapping recovery benefits.

His training philosophy treated HBOT as part of the recovery stack alongside cryotherapy, massage, and structured nutrition. The implicit endorsement helped move HBOT from niche curiosity to mainstream athletic recovery tool.

Ronaldo's recovery regimen has been documented across his career, with HBOT featuring prominently during the Real Madrid years (2009-18) when match congestion was highest. Real Madrid installed dedicated recovery facilities at Valdebebas including hyperbaric chambers; Ronaldo was among the most frequent users.

His ability to maintain elite performance into his 40s — the career durability that distinguishes him from peers — is consistently attributed (by him and his trainers) to obsessive recovery management. HBOT sits in the standard portfolio alongside ice baths, compression, and structured sleep.

Rogan owns and uses a soft-shell home chamber, which he's discussed openly on The Joe Rogan Experience across multiple episodes. He's interviewed Bryan Johnson, Andrew Huberman, Rhonda Patrick, and other longevity researchers about HBOT, helping bring the technology into mainstream awareness.

His personal use is conservative — soft-shell at 1.3 ATA, not the trial-grade hard-shell dose — consistent with the general wellness category most home users sit in. Rogan's reach (the largest podcast audience in the world) has done more for popular awareness of HBOT than any single athletic endorsement.

Huberman is among the most influential science communicators discussing HBOT in popular media. His podcast episodes on hyperbaric oxygen lay out the mechanism (oxygen pressure physics, the hyperoxic-hypoxic paradox), the evidence base (the Tel Aviv research programme), and the practical applications for cognitive performance and recovery.

His own use sits in the mild-HBOT category and is conservative — he's not pursuing the 60-session longevity protocol. His value to the field is educational rather than personal advocacy — he's helped normalise HBOT-as-tool in the broader wellness conversation.

Jackman's Wolverine preparation routines became famous for their physical intensity — the role required him to maintain elite physical condition while on demanding film schedules. HBOT featured in his recovery protocol alongside cold exposure, sauna, and sleep optimisation.

His age (mid-50s) and sustained energy across multiple high-physical-demand roles is part of why his HBOT use is interesting — the recovery and longevity application meeting in a public figure whose body of work spans 25+ years of leading-man performance.