Floating is based on a scientific approach to deep relaxation called “Restricted Environmental Stimulation Technique” or REST for short, developed by John C. Lily, a medical practitioner in the 1950s.   It was called sensory deprivation therapy, but has evolved into what we now call floating.   There have been great advancements in float therapy and it is used not only for relieving general aches and pains, but also helping us achieve clarity and reduce stress.