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Sensory deprivation tanks, also known as isolation tanks or floatation tanks, offer an unparalleled experience of relaxation and introspection. The concept behind these tanks involves the reduction or elimination of sensory inputs to create an environment that minimizes external distractions that stimulate a person's senses. But how does it work, exactly?

The engineering behind it

Typically, a sensory deprivation tank is a lightless, soundproof and water-filled enclosure, often shaped like a large pod. The tank is filled with a solution containing a high concentration of Epsom salt. This high salt concentration makes the liquid dense enough to allow people to effortlessly float atop the surface of the water.

Sensory deprivation process

The flight or fight response is the body's natural reaction to stress or danger, triggering physiological changes to prepare for action. In a sensory deprivation tank, the absence of external stimuli can induce relaxation, helping to counteract the flight or fight response by promoting a state of calm and reducing stress hormones.

When an individual enters the tank and settles into the buoyant water, the salt concentration enables them to effortlessly float, experiencing a sensation of weightlessness. The temperature of the water matches the individual's skin temperature, blurring the line between body and environment.

The tank's design aims to minimize external stimuli. Once inside, the lid is closed, shutting out external light and sound. This absence of sensory information encourages the mind to enter a deeply relaxed state.

Effects on the brain and body

In the absence of external stimulation, the brain transitions into a state of reduced cognitive load. This relaxation prompts the release of endorphins and dopamine, fostering a sense of euphoria and tranquility. Some individuals report heightened creativity, profound introspection, and improved focus following sessions in a sensory deprivation tank.

Advocates of sensory deprivation tanks claim that they experience various potential benefits, including stress reduction, pain management, enhanced meditation experiences and improved sleep quality. Additionally, some users claim it aids in alleviating symptoms of anxiety and depression.