Acute calm is the clearest signal
Multiple studies report immediate changes in self-reported stress, anxiety or relaxation following Floatation-REST.
Book now Floatation-REST evidence guide
Evidence,
without the hard sell.
Floating has been researched for decades. Some findings are encouraging; others remain uncertain. This page explains both, in plain English, and links directly to the original studies.
Last reviewed July 2026 · No sponsored research linksThe useful summary
What can we reasonably say?
Physiology has been measured
Researchers have recorded blood pressure, breathing and heart-rate variability during controlled float sessions.
Long-term claims need caution
Samples are often modest and study designs vary. Promising results are not the same as established medical treatment.
A short history of floating
From experiment to modern float room.
Floatation-REST did not begin as a wellness trend. Its equipment, terminology and research methods have evolved over more than seventy years.
- 1954
The first isolation tank
The earliest tank is widely attributed to neurophysiologist John C. Lilly at the US National Institute of Mental Health.
Historical source - 1960
Published research begins
The earliest Floatation-REST papers found by the recent systematic review date from 1960.
Review the evidence - 1980s–1990s
REST becomes a framework
Researchers used reduced environmental stimulation as a defined method and measured psychological and physiological responses.
See a 1994 study - Today
Better controls, clearer limits
Newer trials use comparison groups and repeated sessions. The field is growing, but larger and more consistent studies are still needed.
See a modern trial
Selected primary evidence
Read the study, and its limits.
We have selected studies that help explain different parts of the evidence—not simply those with the most favourable headlines.
What does “randomised” mean?
Participants are assigned to different conditions by chance. This helps reduce bias, although the comparison group and sample size still matter.
What does “open-label” mean?
Participants and researchers know which experience is being given. The results can be useful, but expectations may influence what people report.
What does “pilot” mean?
A smaller early study used to test an idea or method. It can guide larger research, but it is not usually definitive on its own.
Systematic review · 2025
Read the systematic review A broad view of the evidence
Researchers reviewed 63 peer-reviewed Floatation-REST papers spanning areas including stress, physiology, pain, athletic performance and clinical anxiety. The review describes encouraging findings in several categories while calling for larger studies and more consistent methods.
Best used to understand the breadth—and the current limits—of the field.Randomised safety and feasibility trial · 2024
Read the PLOS ONE study Six repeated sessions
Seventy-five adults with anxiety and depression were assigned to two pool-REST formats or a chair-REST comparison. The study focused on adherence, tolerability and safety rather than proving clinical effectiveness.
The authors concluded that larger efficacy trials are still needed.Crossover physiology study · 2022
Read the cardiovascular study What happens during a float
Researchers compared a 90-minute Floatation-REST session with watching a relaxing nature film in 57 participants. They measured blood pressure, breathing and heart-rate variability during both conditions.
This was an acute laboratory comparison, not evidence of a long-term health outcome.Randomised pilot trial · 2016
Read the pilot trial Twelve sessions and self-reported anxiety
Fifty people meeting self-report criteria for generalised anxiety were allocated to twelve Floatation-REST sessions or a waiting-list group. The results were promising, but the authors described floating as a potential complement and called for further research.
A small pilot with a waiting-list comparison is not definitive clinical proof.Open-label study · 2018
Read the open-label study The immediate post-float experience
Fifty participants with anxiety and stress-related conditions reported changes in state anxiety, stress, muscle tension, pain and mood after one session.
Because there was no blinded control condition, the study cannot establish cause or lasting benefit.A clear boundary
Wellbeing service, not medical treatment.
FLOAT ONE does not diagnose or treat health conditions. These summaries are educational and are not a substitute for medical advice. If you are managing a health condition, pregnancy, medication or any concern about floating, speak with an appropriate healthcare professional before booking.
Read practical FAQsExperience matters too
Your first float introduces the feeling. Three builds a baseline.
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