What the evidence says. Small trials suggest short-term reductions in anxiety after flotation-REST (Feinstein et al., PLOS ONE, 2018). That is early evidence about how people feel afterwards, not proof of lasting health effects.

What to ask. Filtration between clients? Lights-on option? Advice for open cuts, recent skin procedures or uncontrolled epilepsy?

Portland options (float):

• Float On Portland: cooperative float centre.
• Enso Float Portland: dedicated float centre.
• The Float Shoppe Portland: float centre.

What the evidence says. Finnish observational sauna data associate frequent traditional sauna use with lower fatal cardiovascular events (Laukkanen et al., 2015) — association, not causation. Cold immersion evidence for soreness is low quality (Bleakley et al., 2012). Red light evidence is strongest for selected skin/wound outcomes, not fat loss (Avci et al., 2013).

Portland options:

• Shiver & Sweat Portland: sauna, cold plunge and red light.
• Sweat Haus Portland: sauna.
• SWEATHOUZ — Lake Oswego: sauna and cold plunge.
• SolVita Wellness Spa — Tigard: sauna/cold plunge and red light.
• Optimize U PDX: cryotherapy, infrared sauna and red light; also lists IV services.

FDA has not cleared whole-body cryotherapy for medical treatment and has listed frostbite, burns, eye injury and oxygen-deficiency risks with nitrogen systems (FDA archived update).

Portland-area options:

• Optimize U PDX: cryotherapy listed on public site.
• Restore Hyper Wellness — Lake Oswego: cryotherapy, red light and sauna/cold plunge; IV listed by the chain.
• Restore Hyper Wellness — Happy Valley: same service mix; IV listed by the chain.

FDA has cleared hyperbaric chambers for a defined list of conditions and warned against many marketed uses; look for UHMS accreditation for medical programmes (FDA archived consumer update; UHMS facilities; FDA provider letter). Wellness "mild" chambers are a different product.

Portland listing (wellness hyperbaric on public site — verify supervision):

• Urban Wellness Group — Portland: public site lists hyperbaric; also lists IV. Ask chamber type, pressure, gas mix, physician supervision and screening.

Several studios list IV menus. An IV is a medical procedure. We do not recommend IV therapy; we list businesses for their other services.

Ask purpose, supervision, screening, evidence and exit plan. Avoid cure/anti-ageing promises (FDA health fraud). Coaches educate and refer only.

Start free at Level 1; Level 3–5 cover evidence, GLP-1/peptide literacy and jurisdiction. Profile: /coach.

Enquire: support@resohealth.life

Portland's wet winters make indoor float, sauna and contrast popular. Popularity is not evidence. Use float for short-term calm if it helps you, sauna/contrast for heat-cold exposure you tolerate, and cryotherapy only after you understand FDA's risk framing. Keep walking and strength training as the core plan (Physical Activity Guidelines).

Wellness soft chambers marketed for "optimisation" are not the same as UHMS-accredited hospital programmes treating cleared indications. Ask pressure, gas mix, physician supervision, emergency procedures and whether the claim matches an FDA-cleared use. If the answer is vague, walk away.

Friday night culture plus Saturday cryo is a common ask. Alcohol the night before raises dehydration and heart-rate variability; many studios advise against sessions when hungover. If you take medicines that interact with heat or cold, ask your clinician before contrast or cryo.

1. Purpose: medical treatment or wellness session?
2. Supervision: who is on site, and credentials?
3. Screening: heart, BP, pregnancy, medicines, epilepsy, open wounds?
4. Evidence: study or FDA clearance for this claim?
5. Exit: what if I feel unwell mid-session?

Listings from public websites and the Portland directory CSV (checked 3 Nov 2026). Not an endorsement.