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Salubrious effects of Floatation-REST have been shown in persons suffering from mental health conditions; these positive outcomes might be related to the experience of ASC. Micro-phenomenological interviews were conducted with fourteen participants who completed a 60-minute Floatation-REST session, to capture the generic structure of ASC. We found that most participants experience four distinct phases during a session (diachronic structure): after an initial acclimatization phase (1), participants experience a transitional phase (2) that prepares them for a subsequent ASC phase (3), followed by a phase of temporal and spatial reorientation (4). The ASC phase is characterized by the experience of positive emotions, deep relaxation, a loss of orientation in space and time, and a reduction in bodily sensations and thoughts (synchronic structure). The characteristics of the ASC phase emerge gradually and progressively intensify. This micro-phenomenological analysis of Floatation-REST sheds new light on the potential of this therapeutic technique. We discuss possible future research and therapeutic applications of Floatation-REST.<\/jats:p>","DOI":"10.1186\/s12906-026-05415-1","type":"journal-article","created":{"date-parts":[[2026,5,28]],"date-time":"2026-05-28T02:04:24Z","timestamp":1779933864000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["The micro-phenomenology of Floatation-REST"],"prefix":"10.1186","volume":"26","author":[{"given":"Helena","family":"Hruby","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4483-7334","authenticated-orcid":false,"given":"Marc","family":"Wittmann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4858-4220","authenticated-orcid":false,"given":"Stefan","family":"Schmidt","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9448-6528","authenticated-orcid":false,"given":"Prisca R.","family":"Bauer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,5,28]]},"reference":[{"key":"5415_CR1","doi-asserted-by":"publisher","first-page":"230","DOI":"10.1186\/s12906-025-04973-0","volume":"25","author":"E Lashgari","year":"2025","unstructured":"Lashgari E, Chen E, Gregory J, Maoz U. 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