Floatation REST

Domain VII · Transpersonal, psychedelic & altered states · John C. Lilly, Peter Suedfeld, Roderick Borrie · 1954 · US National Institute of Mental Health, USA

What it is

REST stands for Restricted (or Reduced) Environmental Stimulation Technique/Therapy. Peter Suedfeld and Roderick Borrie coined the term to replace "sensory deprivation", which they considered inaccurate. It is an environment and technique, not a psychotherapy. There is no published treatment manual…

Format

• Version followed: the open-pool floatation-REST research protocol of the Laureate Institute for Brain Research, Tulsa (Feinstein, Khalsa and colleagues: the 2018 interoception crossover study and the 2023–24 randomised safety and feasibility trial), with the Karlstad tank programme (Kjellgren; 12…
• REST stands for Restricted (or Reduced) Environmental Stimulation Technique/Therapy. Peter Suedfeld and Roderick Borrie coined the term to replace "sensory deprivation", which they considered inaccurate. It is an environment and technique, not a psychotherapy. There is no published treatment manual…

Who practises it, and how they are trained or regulated

• Flotation is not a drug or medical device treatment. In the jurisdictions checked, commercial float centres are regulated as aquatic or public-health facilities. Western Australia, for example, applies its aquatic-facilities Code of Practice, requiring water filtration and disinfection, a call alarm and light inside the tank, and an age minimum of 16. Clinical use for anxiety and depression is still investigational.

Evidence status, as the guide reports it

• Version followed: the open-pool floatation-REST research protocol of the Laureate Institute for Brain Research, Tulsa (Feinstein, Khalsa and colleagues: the 2018 interoception crossover study and the 2023–24 randomised safety and feasibility trial), with the Karlstad tank programme (Kjellgren; 12…

Questions to explore with your client

• What drew you to it, and what are you hoping it will change?
• Is there physical contact? Was it explained beforehand, and do you feel free to say no or stop at any point?
• Does it involve any substance, plant preparation, remedy or supplement? Has your doctor or prescriber been told, especially about any medication you take?
• Does it involve intense or unusual breathing? Have you been told about the medical conditions for which that is not advised?
• Is it a group, retreat or community? How do they respond if someone wants to leave or raises a concern?
• Who runs it, and what training or registration do they hold?
• What actually happens in a session or meeting, and how often?
• What does it cost, and is there pressure to commit to more?
• How do you feel afterwards, in the hours and days that follow?
• Does it fit with, or clash with, the work we do here?

What practitioners of it watch for

• hesitancy at the door. That suggests choosing the open pool.
• floats used to manage a crisis or in place of care that is needed.
• same-day use of sedatives or other substances. If present, don't float (see 5.9).
• in the trial it had the highest dropout and lower serenity ratings than the pool.
• distress during imagery when the client is alone. Don't use it for trauma memories (see 5.4).

Problems the guide addresses

• First-float fear or panic-like surge
• Claustrophobia and fear of dark or water
• Hallucinations, depersonalisation or detachment
• Trauma memories or disturbing material
• Suicidality and deterioration
• Stuck or declining benefit
• Non-adherence and dropout
• Physical problems
• Intoxication or sedative use
• Eating disorders and body image

When to involve someone else

• New or worsening physical symptoms, or advice to stop or change prescribed medication: involve the client's doctor or prescriber.
• Signs of coercion, isolation from family and friends, escalating costs or secrecy: discuss openly and consider safeguarding.
• A crisis or thoughts of suicide: follow your crisis protocol. In the US, call or text 988; in the UK and Ireland, Samaritans on 116 123.

Drawn automatically from the guide's own sections. Stay curious: neither endorse nor dismiss what the client values, and check anything that matters against the full guide and its sources. Not medical advice.