A flotation tank is a small pool or tank filled with saltwater that allows a person to float effortlessly. It is used for relaxation and sensory deprivation, where you can experience weightlessness and calmness. Full definition
From colon - cleansing colonics and salt - water flotation tanks to Spinning and other exercise classes taking place in pools, hydrotherapy treatments run the gamut these days, and there's plenty of scientific evidence that shows it can improve health in a number of ways. (yogajournal.com)
Flotation tanks perhaps enjoyed their biggest boost with the 1980 release of the film «Altered States,» based on a novel by Paddy Chayevsky. (bookbrowse.com)
The neuropsychiatrist John C. Lilly created the first flotation tank in 1954 to test the hypothesis that the brain could not only function without external stimuli but would also enter a relaxed state conducive to meditation and enhanced creativity. (bookbrowse.com)